Megaman Legends 2

hi, i hope this is the right place to post that.

well i'm trying ro get Megaman Legends 2 to work 100% on ePSXe 1.6.0. i'm using Pete's OpenGL2 Driver 2.6 and Eternal SPU Plugin 1.41.
for Eternal SPU i use default settings.
the game runs great on my system the only problem i have is that i dont have any speech-audio during the sequences, i also guess i don't have 100% soundoutput but i can't tell that for sure since my PSX is too old to run any games anymore.
so, for an example, when i start a new game the intro loads where Rockman and Rolls sky-cruising-thingy flyes through the screen. at this point i don't hear any sound. when the camera switches into the cockpit of that thingy i only hear some background engine-sound. then Data starts moving his :3 mouth and after that Rockmans does. no speech there, just the engine-sound. engine-sound, engine-sound, engine-sound ^^'

for my system:
p4 2,6ghz
1gb RAM
ATi radeon 9700pro
SB Audigy2 ZS

running the game from .bin

if there's someone out there who can help me, please let him read this thread *prays*