help with error filePath.indexOf is not a function ??

hi,…

I got problem when I’m trying to load combo from php with ajax, the error is “filePath.indexOf is not a function”, but when I try with file.xml itself it OK, here my code :

...
$.post("?mod=resep_pasien&cmd=loadCombo&{SID}", { row:'signa' },function(data){					

	var combo = mygrid.cells(rowId,9).getCellCombo();

	combo.clearAll();		

	combo.loadXML(data);

},"xml");
...

and I try the url itself with firefox the xml is fine.

regard.