Mplayer on Windows 7 won't play video files

I tried installing ffdshow like I always did (all at default) but I get "Windows Media Player cannot play the file. The Player might not support the filetype or might not support the codec that was used to compress the file"

Preview icon works great (file in the folder itself) but double clicking gives me this message
I don't want to install any codec packs as I had hell of a problem with them before. I tried forcing ffdshow to decode with wmplayer.exe in options but nothing happens.

It is fresh install of Win7 -64bit
Any ideas folks?


*edit*
it is the same with mp3 files. They wont open with mplayer just noticed that

have you the Codecs, if not see here http://www.sevenforums.com/music-pictures-video/16179-win7codecs.html

There are a few Micro$oft pages, too....

• Download Center (Windows Media Worldwide)
• Codec Installation Packages for IT Professionals might help bring-back what the codec packs have overwritten (Google query "Windows Media Player Codecs Pack").
• There used to be WMPlugins.com, but like all good things, Micro$oft made sure they will go away.
  

  Microsoft has retired WMPlugins.com. Thank you to all of our Windows Media Player partners and customers who submitted plug-ins over the years to help give users a richer media experience.

  Click to expand...