MP3 Codec missing ?!

[famdebraaf]

Installed this afternoon the new version 5 (Wow what an improvement -
compliments!!) - have been using XATSHOW to ful satisfaction after
I bought my digital camera. Was very eager to try it all out. What a
disappointment that I have not been able to create a VCD - error
message: no MP3 codec installed (strange I can play MP3 files etc.)!
Eventhough the previous version of XATSHOW did not have this error
message - I donwloaded and installed the latest version of Microsoft
Windows Media Player (for XP)as suggested opn the XATSHOW website -
restarted the 'engine'and still the same error message.

Can somebody make some suggestions ? I'm running on Windows XP -
have installed the newest version of Media Player (9). What else can
I do ?

thanks, Michael