Unknown File Format()

[anime_file]

BSplayer one day when I was trying to play an .ogm popped up "Unknown File Format()".
"BSplayer v1.00.810, Unhandled exception at EIP: 004D92C1
If you click 'Close' application will be terminated.
Please report this info to the author with description what were you doing.
Access violation at address 004D92C1 in module 'bsplayer.exe'. Write of address 0000000C
EAccessViolation
, 0x0054149F, 0x0054169D, 0x0045554B, 0x0044C896, 0x77E11EF0, 0x77E13D1E, 0x77E16E9B, 0x717521F0,

Bytes at EIP: FF 43 0C 8B 53 0C C1 E2 03 8D 14 92 8D 43 10 E8 07 95 "

The thing is that the video still plays, do you guys know what's wrong?
I also got an Unknown File Format(div3) when playing avi.