help setting up wireless

we just moved into a new apartment today and we had wireless set up in our old one. I took the router and connected it and selected the old network in our new apartment and it shows it as connected but when I try to load a page it just sits there and doesn't do anything.

help please?

 

the router is connected to the phone line/ethernet port plug thing in the wall. our internet is free from the apartment complex like it was in the last one, and the one before that.

last time all we did was unhook it and bring it to the new apartment and connect. this time it's there but it doesn't do anything

 

I tried deleting the old connection then I reset the router and hooked it up with it connected to the wall and the macbook then I set up the router again and it worked and let me go online but when I disconnected it the wireless won't work.

So I think it's something set wrong on the router but I'm not sure what.

 

That sucks. Is there a way to check? The wireless connection that I made earlier with it connected does show up though. It shows a full signal and that it's connected but it just sits there loading then says it's not connected to the internet even though the signal doesn't change.