Thanks for reporting.
We just tested the PCMCIA-FBUS Series 2 card with an old SONY VAIO PCG 505 laptop, which has Ricoh R5C475II cardbus controller. The result is the same: the system hangs. So it must be a hardware compatibility issue.
But we don't have a good solution for this compatibility issue currently; please try to avoid using Sony laptops with PCMCIA-FBUS Series 2 card.
For the new laptops, we suggest the new model laptops having Cardbus controller of Texas Instruments, Toshiba, O2Micro or ENE instead of Ricoh. Sorry for the inconvenience.