Please Help! Unable to Connect to Wireless Internet

I recently had to run a system recovery on my computer. I am able to connect to every other wireless server, but the one in my apartment. I have downloaded all windows updates, and reset the router. When I attempt to type in password, I get an error message. The message reads, "The network password needs to be 128bits or 256bits depending on your network configuration. This can be entered as 8 to 63 ascii characters or 64 hexadecimal characters."
What do I need to do?
2 days ago - 2 days left to answer.

Additional Details
It is a router, and it is a communal router for the apartment
2 days ago

I am typing in the right password, and the connection works on other computers, with the same password. I think it has something to do with the system recovery, but I can't figure it out.
2 days ago

I have windows XP Home Edition. I appreciate any help. Thanks

redshirt4