the problem is now solved using warp3d 4.0. 4.2 is the one I was using before. thanks all, for your help.
I will be setting up two A4000 CSPPC systems with new hard drives and clean installs in the next week or two. Would you have the time to write down the steps you went through to get your setup the way you want it with the PPC working as good as it can? Just a short guide of what steps should be taken and pitfalls to avoid would be much appreciated and could possibly be moved to one of the guides or Amiga wiki sites for future users too.