installation troubleshooting

docs/user_guide/install/install.rst

@@ -16,3 +16,19 @@ How to Install?
 
 You can now find the Animation-Nodes editor in the node editor.
     .. image:: animation_node_editor.png
+
+
+Troubleshooting
+***************
+
+The addon sometimes depends on features that are in newer versions of Blender.
+So the first thing should be to update your Blender version.
+
+Possible solutions to installation problems:
+    * Enable ``Auto Run Python Scripts`` in the *User Preferences > File* tab.
+    * AN depends on the module *numpy* that is distributed with official releases
+      of Blender. If you build Blender yourself or use custom builds
+      (e.g. from graphicall.org) you have to make sure that they contain numpy.
+      If not you have to get another Blender build or install `numpy`_ manually.
+
+.. _numpy: http://www.numpy.org/