MM_XSLTransform error.
[RSS URL] is not a valid XML document.
Non-static method DOMDocument::loadXML() should not be called statically,
assuming $this from incompatible context in file
I recently came across this error and took me a lot of searching to find out the right fix for it. Here is where you can find the fix.
http://groups.google.com/group/macromedia.dreamweaver.appdev/browse_thread/thread/832446ccb50569f3