Blocked machine

[daniel escartin EXCHANGE03_VirtYH04]

Hi all,
Im working with PC Card Adapter PC750 and a 11Mbps wireless LAN PC card
but when I connect the my PC card I have more or less 10 minutes to work,
after this time keyboard and mouse are blocked, only sometimes I can
work more time, one of this times I have tried login one laptop with one
Orinoco card installed using WEP and it has worked but only five minutes
more.

Thank you very much.