diff --git a/src/com/jmibanez/tools/jmeter/MethodCallRecord.java b/src/com/jmibanez/tools/jmeter/MethodCallRecord.java
index d69231c..ccf1ae8 100644
--- a/src/com/jmibanez/tools/jmeter/MethodCallRecord.java
+++ b/src/com/jmibanez/tools/jmeter/MethodCallRecord.java
@@ -24,6 +24,8 @@ public class MethodCallRecord
     private Class<?>[] argTypes;
     private Object[] args;
     private byte[] argsPacked;
+    private String mangledMethodName;
+    private String mangledArgs;
     private Object returnValue;
     private Throwable returnException;
     private boolean isException = false;
@@ -39,7 +41,10 @@ public MethodCallRecord(final int index, final String target, final Method m,
         this.index = index;
         this.target = target;
         this.argTypes = m.getParameterTypes();
-        this.method = constructMethodName(m.getName(), this.argTypes);
+        this.method = m.getName();
+        String[] builtNames = constructMethodName(m.getName(), this.argTypes);
+        this.mangledMethodName = builtNames[0];
+        this.mangledArgs = builtNames[1];
         this.args = args;
         this.argsPacked = packArgs(this.args);
     }
@@ -56,6 +61,14 @@ public String getMethod() {
         return method;
     }
 
+    public String getMangledMethodName() {
+        return mangledMethodName;
+    }
+
+    public String getMangledArguments() {
+        return mangledArgs;
+    }
+
     public Object[] recreateArguments() {
         this.args = unpackArgs(this.argsPacked);
         return args;
@@ -111,24 +124,25 @@ public Map<String, String> getRemotePathsInReturn() {
         return remotePathsInReturn;
     }
 
-    public static String constructMethodName(String methodName, Class<?>[] argTypes) {
-        StringBuilder sb = new StringBuilder();
-        sb.append(methodName);
+    public static String[] constructMethodName(String methodName, Class<?>[] argTypes) {
+        StringBuilder full = new StringBuilder();
+        StringBuilder args = new StringBuilder();
 
         if(argTypes == null || argTypes.length == 0) {
-            sb.append(":");
-            return sb.toString();
+            return new String[] { methodName + ":", "" };
         }
 
-        sb.append(":");
+        full.append(methodName);
+        full.append(":");
         for(Class<?> c : argTypes) {
-            sb.append(c.getName());
-            sb.append(",");
+            args.append(c.getName());
+            args.append(",");
         }
 
-        sb.deleteCharAt(sb.length() - 1);
+        args.deleteCharAt(args.length() - 1);
 
-        return sb.toString();
+        full.append(args);
+        return new String[] { full.toString(), args.toString() };
     }
 
     private void writeObject(ObjectOutputStream out)
diff --git a/src/com/jmibanez/tools/jmeter/RMISampleResult.java b/src/com/jmibanez/tools/jmeter/RMISampleResult.java
index dfda405..255a582 100644
--- a/src/com/jmibanez/tools/jmeter/RMISampleResult.java
+++ b/src/com/jmibanez/tools/jmeter/RMISampleResult.java
@@ -142,7 +142,9 @@ private void writeObject(ObjectOutputStream out)
         if(method != null) {
             out.writeUTF(method.getClass().getCanonicalName());
             out.writeUTF("\nM:");
-            out.writeUTF(MethodCallRecord.constructMethodName(method.getName(), method.getParameterTypes()));
+            String[] builtNames = MethodCallRecord.constructMethodName(method.getName(),
+                                                                       method.getParameterTypes());
+            out.writeUTF(builtNames[0]);
         }
         else {
             out.writeUTF(classOwnerName);
diff --git a/src/com/jmibanez/tools/jmeter/gui/NativeRmiProxyControllerGui.java b/src/com/jmibanez/tools/jmeter/gui/NativeRmiProxyControllerGui.java
index 83924dd..55555f4 100644
--- a/src/com/jmibanez/tools/jmeter/gui/NativeRmiProxyControllerGui.java
+++ b/src/com/jmibanez/tools/jmeter/gui/NativeRmiProxyControllerGui.java
@@ -302,10 +302,10 @@ private void init() {
         JLabel portLabel = new JLabel("Proxy Port");
         portLabel.setLabelFor(proxyPort);
 
-        samplerNameFormat = new JTextField("[%1$s] %2$d - %3$s", 100);
+        samplerNameFormat = new JTextField("[%1$s] %2$d - %3$s:%4$s", 100);
         samplerNameFormat.setName(SAMPLERNAMEFORMAT_FIELD);
 
-        JLabel samplerNameFormatLabel = new JLabel("Sampler Name Format");
+        JLabel samplerNameFormatLabel = new JLabel("Sampler Name Format [1: Target; 2: Call Index; 3: Method; 4: Args]");
         samplerNameFormatLabel.setLabelFor(samplerNameFormat);
 
         JPanel configBox = new HorizontalPanel();
diff --git a/src/com/jmibanez/tools/jmeter/impl/RmiSamplerGeneratorMethodRecorder.java b/src/com/jmibanez/tools/jmeter/impl/RmiSamplerGeneratorMethodRecorder.java
index b9f2aef..d695d57 100644
--- a/src/com/jmibanez/tools/jmeter/impl/RmiSamplerGeneratorMethodRecorder.java
+++ b/src/com/jmibanez/tools/jmeter/impl/RmiSamplerGeneratorMethodRecorder.java
@@ -36,7 +36,7 @@
 public class RmiSamplerGeneratorMethodRecorder
     implements MethodRecorder {
 
-    public static final String DEFAULT_SAMPLER_NAME_FORMAT = "[%1$s] %2$d - %3$s";
+    public static final String DEFAULT_SAMPLER_NAME_FORMAT = "[%1$s] %2$d - %3$s:%4$s";
 
     private static Log log = LogFactory.getLog(RmiSamplerGeneratorMethodRecorder.class);
 
@@ -161,28 +161,31 @@ public void recordCall(final MethodCallRecord r)
         BeanShellPostProcessor retValProc = null;
         sampler.setProperty(TestElement.TEST_CLASS, RMISampler.class.getName());
         sampler.setProperty(TestElement.GUI_CLASS, RMISamplerGUI.class.getName());
-        sampler.setTargetName(r.getTarget());
+        sampler.setMethodName(r.getMangledMethodName());
 
         String instanceName = r.getTarget();
+        sampler.setTargetName(instanceName);
         if (instanceName == null) {
             instanceName = "";
         }
 
         int index = r.getIndex();
         String method = r.getMethod();
-        sampler.setMethodName(method);
+        String mangledArgs = r.getMangledArguments();
+
         String samplerName = "";
+
         try {
             samplerName = String.format(samplerNameFormat,
                                         instanceName, index,
-                                        method);
+                                        method, mangledArgs);
         }
         catch(Exception e) {
             // use default format
             log.warn("Invalid sampler name format", e);
             samplerName = String.format(DEFAULT_SAMPLER_NAME_FORMAT,
                                         instanceName, index,
-                                        method);
+                                        method, mangledArgs);
         }
         sampler.setName(samplerName);
 
diff --git a/test/com/jmibanez/tools/jmeter/MethodCallRecordTest.java b/test/com/jmibanez/tools/jmeter/MethodCallRecordTest.java
new file mode 100644
index 0000000..2083d84
--- /dev/null
+++ b/test/com/jmibanez/tools/jmeter/MethodCallRecordTest.java
@@ -0,0 +1,28 @@
+package com.jmibanez.tools.jmeter;
+
+import java.util.List;
+import java.util.Map;
+import junit.framework.TestCase;
+
+public class MethodCallRecordTest extends TestCase {
+
+    public void testConstructSimpleMethodName() {
+        String[] builtNames = MethodCallRecord.constructMethodName("foo", null);
+        assertEquals("foo:", builtNames[0]);
+        assertEquals("", builtNames[1]);
+    }
+
+    public void testConstructMethodNameWithOneArg() {
+        String[] builtNames = MethodCallRecord
+            .constructMethodName("foo", new Class<?>[] { String.class });
+        assertEquals("foo:java.lang.String", builtNames[0]);
+        assertEquals("java.lang.String", builtNames[1]);
+    }
+
+    public void testConstructMethodNameWithSeveralArgs() {
+        String[] builtNames = MethodCallRecord
+            .constructMethodName("foo", new Class<?>[] { String.class, Class.class });
+        assertEquals("foo:java.lang.String,java.lang.Class", builtNames[0]);
+        assertEquals("java.lang.String,java.lang.Class", builtNames[1]);
+    }
+}