repeating audio

I am putting a sound board in my HP LH II dual processor computer and have 
run up against a problem.  When I try to play a .mpg file a 2 or 3 second 
section of sound repeats indefinitly.  I have seen somewhere a string of 
messages that the dma transfer did not complete properly.  This is a Telewave 
Q32 board that requires an interrupt for the sound and the mpu.  Can these 
interrupts be the same?  (they are both set to 5 now).  I cannot seem to use 
isapnp to change them to be different because the board keeps getting 
recogniized during the boot process and the modules installed which causes 
isapnp to give a warning that the ioaddr resource is not available.  My mpu 
interrupt change never sticks.  Can I temporarily cut off the boot autodetect 
to see if that is what is killing the interrupt number change?  Any ideas 
would be appreciated - I have not been able to listen to my music in days.  
Thanks. BB