Problem solved already.
I went into HDTOOLBOX and saw that I had missed a setting and saved the changes and the partion showed up after reboot

I can tell you that PFS3 is a big change in speed compared to FFS, I recommend it to everyone.
Anyway thanks for showing interest in helping me Thomas, have seen you help alot of people at EAB, keep up the good work so people really can enjoy their amiga's to 100% :-D