Internet Gateway Disappearing?

[helljumperz]

Ok, over the last few weeks my internet (Verizon Broadband - the wireless junk) has been shared over my router so I can use it on several computers. It would work fine for say a week; then it would only work for like 5 - 15 min at a time then the Internet Gateway would disappear but the network would stay connected. Ive tried it in rain and clear weather and it still does the same, and after I wait a few days it goes back to normal for a few days then all **** breaks loose and does it again. The Gateway is only out for a few seconds but its enough when playing a game it will disconnect.

Ive messed with many settings and still have no idea whats happening , I have a good signal too.

Any help would be appreciated.