Cisco aironet 350

[woser]

I have some problem with Cisco Aironet 350 (PCI) Card working but afte 5m inutes Internet is disconnect, I have also Cisco Aironet 340(PCI) and this card work correctly and never disconnect the firmware is the same. Where the problem is ? What is more I have minipci aironet 350 and when I try this card card, after 5 minutes block all system. And I have not acces to pfsense.