Well, it seems like the built-in Extreme Air-port doesn't work very well in my MBP896. Let me see, how can idescrible it
If the signal is very well, like on campus, it works just fine, very stable and fast.
But if the signal isn't very well, but reasonablly acceptable, like in my apartment( they provide free but sick wireless service). Sometimes, when my 4year old BenQ can download something with speed up to 400KB, the Mac still can't connect to the wi-fi network. Some times i got lucky, being able to connect to the network, it still constantly disconnect every 10minutes, i have to restart the Airport to have it work
Sometime, a window will pumped up saying something like HDCP configuration
, My IP address is used by someone else

Anyway, i got realy confused
Any here can help me out? or it's jsut the way how it works?
If the signal is very well, like on campus, it works just fine, very stable and fast.
But if the signal isn't very well, but reasonablly acceptable, like in my apartment( they provide free but sick wireless service). Sometimes, when my 4year old BenQ can download something with speed up to 400KB, the Mac still can't connect to the wi-fi network. Some times i got lucky, being able to connect to the network, it still constantly disconnect every 10minutes, i have to restart the Airport to have it work
Anyway, i got realy confused