HELP! - ISDN device not working with 16M DOC2000 but working with 8MB DOC Millenium

[MG]

I can mount nftla1 from the 16MB DOC2000, but when I try to load the hisax
module for the Sedlbauer ISDN card it simply does not work.
When I try to do the same thing with a 8MB DOC millenium I can load the
hisax module without any problem.

Same problem with wavelan - PCMCIA.
it works perfect with 8MB DOC Millenium but with 16MB DOC2000 it does not
work?

What is going wrong here???
I would be very happy about any hints / help.

Best regards
Michael