Psycho Wireless Card...

Dell Inspiron 5100
2.4 GHz, 512 RAM
Windows XP Home

I've had this laptop for awhile, but I bought it without a wireless card. So later on I bought one, a WLAN a+b combo mini-PCI. It works alright, more or less, when the access point is broadcast. But, I'd like for it to still be work even after taking away the broadcast... I've setup the SSID and the network key so it should be able to connect. It only randomly connects now and then though, which is becoming very very irritating. Also, keeping it broadcast is not an option.

PLEASE HELP!!!!

Thanks,
Josh