SBlive 5.1 problem with DVD Subtitles

[NarmeR]

Hello,

I'm having the strangest problem with my sblive 5.1.
Whenever i enable the DVD subtitles the sound begins stutering. I'm using nvDVD and i've already tried powerDVD and WINDVD but the problem continues.

Anyone got an ideia what could be the problem ??

SPECS:
CELERON 500
128 mb RAM
G4 MX 440
win XP

Installed latest VIA 4 in 1 Drivers, latest live 5.1 drivers and nvidia Detonator drivers.

Tanx