do you need vpn to use wifi?

[wifi question]

i got my lifedrive to connect to my wireless router (ie, it says 'connected') to the network but when i open blazer to surf the net it says page unavailable like it's basically not connected. what am i doing wrong?

[more details]

i have key type 40 bit hex, and entered the 10 digit wep key, which was recognized; do i need to enter the "four keys" or manipulate anything else?