ALSA 0.2 drivers

I have seen this question posted before but no solution so I’m going to try

I have ALSA 0.2 drivers loaded on my Compaq 400 with a built in sound card
(Sound Blaster Audio PCI 128) running QNX4.25. The audiotrap command
detects the card and starts the deva-sb driver.
deva-sb &
Attaching to irq: 9
0 - Sound Blaster Pro at 0x220, irq 9, dma 1
Everything looks good but when I try to play a wave file, I get :
Error: audio open error: Resource busy

Looks like it can’t open the /dev/pcm00. Any suggestions?