Is 3ivx incompatible with Xvid?

[Dxviz]

I tried to play a Nero Recode movie in BSPlayer but found there was a picture but no sound. When I looked in the BSP forum there was a recommendation to someone with the same problem to get the 3ivx codec. I installed it and Recode had sound. But when I later tried to play Xvid videos in BSP they kept crashing after about 10 seconds with the M/soft "send/dont send" error report coming up. I uninstalled 3ivx and Xvid worked fine again. Is 3ivx incompatible with Xvid or are there some settings I need to change in order to have both codecs work with BSP?