mplayer suddenly stops playing dvd

[Arkajyoti Misra]

I am having a strange problem with mplayer - it stops playing dvd
after some time. Here is a sample error message after it played a dvd
for about an hour:
a52: CRC check failed!  0.007 ct:  0.166 105024/105021 23%  2%  2.1% 15 0
a52: error at resampling
A:  52.5 V:  52.6 A-V: -0.065 ct:  0.156 105033/105030 23%  2%  2.1% 15 0

Exiting... (End of file)

Does anyone have any clue?
I am running MPlayer 1.0pre6-3.4.2 on a Toshiba laptop.

Arko.