Windows 7 - Sound on movies on *.rmvb is weak

hello,
Well, each movie *. Rmvb play in BSPlayer, WMP or Media Player Classic or other player it doesn't work, and movies *.Avi, *.Wmv, *.Mp4 or another format to work smoothly.

We're writing what exactly it isn't working, the picture is, only the sound of creaking / hissing / buzzing and it didn't hear what they say in the film.

I will add that player KMPlayer plays me every type of movie without crashing and dissonance, it is known, it has built its codecs.

I played in these video player in the movies in other formats and work, so there should be no problems with the player, perhaps the codecs, and something must change in ffdshow audio or somewhere else.

I have the latest version of codecs K-Lite Codec Pack,
and the system is Windows 7 x64 ultimate

I hope my problem clearly stated

thx for help me

Your choice of codecs is most likely the problem. Uninstall Klite and Real Alternative
Here are downloads links to current releases of Windows 7 codecs:
32bit Win7codecs and the x64Components addon

After installation, open the Settings Application(s) using a rightclick on the shortcut and choose 'Run as Administrator', and then select the [x] SUGGESTED settings checkbox. If you still experience problems with rmvb files, there is a 'splitter selection' for these filetypes on the AVI~RM TAB which would most likely correct the problem.

These codecs releases are specifically designed for Windows 7.