error of node searching

[R3D9477]

Hi. I have error of node searching in my simple example:

package;

import xmlTools.XPath;

class Main {
    public static function main () {
        var xml = Xml.parse("<a></a>");

        var xpath = new XPath();
        var result = xpath.resolve(xml, "//a");
    }
}

error:

Called from ? line 1
Called from Main.hx line 10
Called from xmlTools/XPath.hx line 113
Called from xmlTools/XPath.hx line 205
Uncaught exception - Bad node type, expected Element but found 6

any ideas?

thanks

upd
I added * instread of // in my XPath and it works fine!

package;

import xmlTools.XPath;

class Main {
    public static function main () {
        var xml = Xml.parse("<a></a>"); 
        var xpath = new XPath();
        var result = xpath.resolve(xml, "*/a");
        trace(Lambda.array(result).length);
    }
}