If so I've seen this happen. Good luck,
I own a XBOX 360 and a D-Link Wireless N Router. The N router is currently operating on a G band. My XBOX 360 can connect to my router via a WPA encryption, but not WPA2 encryption.
Both the XBOX 360 and my router supports WPA2 encryptions. But when I have the router on WPA2, the XBOX 360 cannot locate the router. When I try to edit the network configuration on the XBOX 360, it'll show me the choices of encryption but it has WPA2 listed as a choice but unavailable to choose.
Does anyone have suggestions?