Cant connect xbox live through my pcs wireles

Hello,
i have a problem where i cannot connect my xbox live through my pcs wireless

i have Last XP V22.0.2009, when i go to the local area connection properties and allow sharing, i then have to select the network connection, the only 2 that come up are VMware Network Adapter VMNet1 and VMware Network Adapter VMNet 8, i cannot find tiscali anywhere, i have also tried doing the same in wireless network connection properties, but tiscali again, fails to come up, any suggestions to what i could do - would appreciate your help

p.s. i can connect it via my sisters laptop but not this one, as tiscali appears in the private network connection, i can also connect to the internet on my pc so it is not my computer connection.