i have adelphia cable internet. and have had a router for a long time. recently i bought a labtop so i went out and bought a wireless router and wireless card to set up a new network. i bought a LinkSyS wireless 802.11b router. and a Blitzz wireless carb designed for the 802.11b network. so i get home hook up router. plug in my two destop compuyers they work, plug the wireless card in my labtop install the drivers, it works great. about 20 minuties after, my internet said there was no connection, i look down at the wireless card it says everything is linked and the activity light is blinking.so i restart the computer and boom again it works, this time only for about 2 min then the same thing. i have reset the router downloaded newest drivers. ive tried everything i could think of. what do yous think it could be?