we have the following: cisco access points dell 510 notebooks with intel wireless nic novell problem: system will connect to the wireless one time and allow logging into novell and windows before getting to desktop. the next time you have to use windows login only do to system can not find network. the proset says it has a valid ip address but we can not email, internet, or connect to network. once we disconnect from the wireless and reconnect everything works fine. then thing work correctly for maybe a week then we have to repeat the same steps again to make it work again.