Illegal operation in <unknown>
 

Whenever I try to open WMV files, or most AVI files, I'd always get this error:

WINAMP caused an invalid page fault in
module <unknown> at 0000:b00c5457.
Registers:
EAX=ffffffff CS=017f EIP=b00c5457 EFLGS=00010212
EBX=85e6ca64 SS=0187 ESP=007365a4 EBP=00000280
ECX=000001e0 DS=0187 ESI=00000000 FS=da37
EDX=d35450e0 ES=0187 EDI=85e6cb90 GS=0000
Bytes at CS:EIP:
c7 86 84 00 00 00 a4 01 00 00 89 4e 7c e9 ee 03
Stack dump:
85e6cb90 85e6caac 007366c0 85e6ca64 000001e0 ffffffff 00736940 bffa1d67 00000024 85e6cb90 b00c4523 b00c456d 85e6ca64 10000000 85f6a23c 0073673c

I'm using Windows 98, and Winamp 5.03 if it helps.

I'd usually get this error, too, when I try to open the same file in Divx Player, and Windows Media Player just plain freezes.