Dhtmlx tree with menu

If i attach some context menu with a tree it is not working properly in Mozilla… even though i changed that _context.xml file, the firefox browser is displaying the old menu only. wht is the solution??

It is pretty rare situation, but situation can be caused by XML caching ( both IE and FF like to cache external XML files )
You can resolve issue by adding some random element to XML url

    menu.loadXML(“some.url?uid=”+(new Date()).valueOf())