10.5 + 5160/5162 problems when stopping Parallels.

I have done a clean install of 10.5, then Parallels would not start up. Happened several strange things. So I installed 5160 from scratch.

Still there were problems. Some VM's ran with no problem, others would not stop correctly and needed a ForeQuit.

So (after reading here) I dl'ed 5162 and installed.

It apparently works however I cannot use Coherence because when I stop Parallels and it is in Coherence mode then all possible is ForceQuit.

Will it take long to solve this problem?