I don't know if anyone can even help me with this issue here, but i'm desperate and it's worth a shot.

Ok so here is the story. For the past 2 weeks I've been able to play on Xbox LIVE using my laptop as a gateway (using the wireless chip in the laptop to pick up a signal from the router and connecting the laptop to the xbox with an ethernet cable). I decided to dump my hard drive yesterday and reinstall windows and everything. Now I cannot connect to xbox live using my laptop...I have all of the drivers needed and I am sure I did everything right. I went to Network connections->Wireless Netowkr Connection->advanced->and i checkked the box the allows sharing of the network. On my xbox it connects the xbox to the network, netowkr to internet, but then it fails (I get the big red X)at connecting to xbox live (that's what happens when i Test xbox live connection) Can anyone help me and figure out why this no longer works for me? I NEED XBOX LIVE ;( ;( ;( ;(

p.s. bridging the connections didnt work either.