sony vaio buildin wireless and external card

Hi,I hope somebody can help me.
I have sony vaio (PCG-V505BX)with build in wireless (b) witch works fine.
I try to connect to Belkin router pre-N with external PCMCI card which came with the router. Works for two minutes and the computer freezes.If I take it out of the slot everything is OK. I am using Belkin wireless utility,disabled internal card,stop windows wireless zero configuration service but nothing works. Now does not even recognized the Belkin card anymore. please help,I know VAIO laptops are hard to deal with specially when running windows which did not came with the laptop.I am running Windows XP Professional SP2 NOT original operating system. Thanks in advance.