Thank you very much Darrel.

I also went through the hardware, and found nothing wrong.
10Mhz xtall, 15pf caps, HSPLL (DEF. OSC 40) does not work.
20Mhz xtall, 15pf caps, HS_OSC (DEF. OSC 20) works.

Testing it with 40Mhz using a test code (without MIBAM) is ok.