i'm using a Cisco Aironet PCMCIA-Card in my Notebook (CB21AG)
Several pages are not reachable, if the encryption at my router (TP-LINK 802.11g) is enabled. It doesn't matter if WEP or WPA. If the encryption is disabled, all pages are reachable. This affects also www.cisco.com
The problem is definitively the Cisco card. All other Computers in my LAN are connected fine without problems. The chipsets are Ralink and Intel.
I'm using the latest drivers and also the latest Firmware at my router.
Any ideas ?