OK, so I live in an apartment, and our friend above us decided to split the bill with us and we can use his wireless internet, and that works fine, I am on a desktop pc with a PCI Wireless card, and it's working fine, but I want xbox live through this, I've tried everything, but nothing works, mwhen I go to test connection on xbox, it fails at network, it says it cant obtain an ip address, how can I fix it without buying the 100$ wireless adapter for xbox?
tl;dr= loving XBOX LIVE WONT loving WORK