freerunner unable to work with 3G SIMCards?

[Arne Zachlod]

Hej guys, I had got my today and i have tested it, but my 3G card 
doesn't function with it. he can't find a network and is unable to get 
the pin. (i have disabled pin with another phone, then there was only 
the problem that he doesn't find a network). but with other SIM Cards 
form same provider there is no problem.
and other, non-3G-phones hasn't problem with this card, too.
i have no idea where i can find any informations. the gsm.log file 
doesn't exist and my gsm-firmware-version is moko8. So, my question is: 
does anybody else has a problem with 3G Sim card?

Thank you, Arne