movie maker effects forum

Help me add new effects to windows movie maker!?
So I have an addonTFX folder in the right place, i went to the wmm forums, i copy and pasted a code for vista (i have vista) into notepad and then saved them as .xml. but when i try to use them, they show on the screen as just a little red “X” and when i add them to a clip the clip turns black. I know I just didn’t get a bad code either because I’ve tried three others, all with the same result.
Please help, i think i’m doing something wrong, I just don’t know what!
Your addontfx folder should be this one:
C:Program FilesMovie MakerSharedAddOnTFX
Here is a great resource for WMM – especially Rehan.
http://www.windowsmoviemakers.net/Forums/ShowForumGroup.aspx?ForumGroupID=1
or go to his website:
http://www.rehanfx.org/
Windows Movie Maker Cool Effects Tutorial #1