DRM protection in video files

[croatia21]

I cannot play the movies that are drm protected. I have download this movies from internet.
When i try to play the movies i must first type password. The password is correct and then compter start to load the movie. It cannot load the movie and give me this message:
The audio codec identified by the format tag 161 is required to play this file. To determine if this codec is available to download from the Web, click Web Help.

I have downoad reqested codec but i still cannot play it. This is the name of the codec that i have downloaded: DivX ;-) Audio Compressor tag 161 tag 353It.
Movie player allways tells me that he need this audio codec. I have also download WM9Codecs.exe.

I have tried to play movies in WMP7, WMP9 and WMP 10 (in windows xp pro and windows 98 2E)

Please help me.

[hue_jass]