Windows Media Player 11 messed up

I got a mp4 file and my windows media 9 wouldnt play it, nor winamp or quicktime, so I upgraded to windows media 11. It wouldn't play it either but it worked with all of my older videos. Then I downloaded 3ivx and the mp4 file worked. When I tried to open my old videos in windows media 11 it says "The application or DDL C:/windows/system32/wmpdxm.dll is not a valid windows image. Please check this against your installation diskette". Then when I tried to open the mp4 video again it gives me the same message. I tried uninstalling windows media 11 and that didn't work. Whats wrong?

 

no one can fix this?

 

Try reregistering the Wmpdxm.dll file.
Start>Run>cmd
At a command prompt, type: "cd c:\windows\system32" (without the quotation marks)
Hit Enter
then type: "regsvr32.exe wmpdxm.dll"
(again no quotation marks)
Hit Enter again

http://joelkilgore.com/regsvr.jpg

 

thanks bro! You are amazing.

 

You are welcome