Router Dropping Will not connect

So i moved into a new place with roommates who have an existing router setup. The have a pretty fast internet connection and a setup with an older netgear router. One has an old macbook (13-widescreen) and one a sony netbook of some sort or a really small viao.

The both connect to the internet with out a problem.

I have a new aluminum macbook and I can't connect. Usually what will happen is I will get home and have a decent connection for about 5 minutes. After that pages will load but the progress bar will stall. And then within five minutes I can't open anything, and finally it will boot me off, and when i try to reconnect it just asks me for the password which is saved in the keychain and it just does a connection timeout til i give up.

Now the weird thing is this. I tried bypassing the router and direct connecting the cable modem and still nothing. I have gone into the settings, messed with those, rebooted, everything an I can't solve it (both my roommates are not techies so they aren't much help). I have no problem connecting to anyother network. it is a WEP set up. ANY help would be most appreciated.

 

I did all that and there is no change. mine is the only machine that will not hold a connection, AND oddly neither will my iphone. I bought a new router but it was DOA so I have to wait to check that out.

 

Actually upon further investigation I have noticed the firmware can be upgraded (the router in question is a netgear WGT624) however it rejects the upgrade, i do this hardwired and it just rejects teh file that i download for the upgrade as invalid.