HELP!! OS 2002 vs OS 2003

[Mouser]

I have an X5 300 Mhz with OS 2003 and an X5 400 Mhz with OS 2002. I downloaded the Core Player on the 300 Mhz and it will play both WMV and AVI files. I am pretty sure I downloaded the same Core Player on to the 400 Mhz but it will only play AVI. I prefer to play my movies on the Core Player, as it seems to be smother than WMP. I am using Pocket DVD Studio to convert my DVDs to WMV. Is this a problem with OS 2002? If I upgraded my OS to 2003 will the Core Player then play WMVs?

[Mahstah]

It's one of two things- either 2002 is incapable of playing the same formats as 2003 with the same video player or you installed additional codecs for TCPMP on 2002. All available codecs can be downloaded from the free download site.