networking hardware problems

recently our family has spent thousands of dollars upgrading our computers and getting DSL with a wireless network, i have got a "compex WLU11A" external network device to connect to our network and now i am having driver problems because every time i turn my computer on and windows xp starts up the device is recognised but it does not detect the network untill i uninstall the device and and then re-install it and then it works perfectly and have no idea what is wrong and why it will not work on startup... this is where you come in.....

my computer specs are below and anything would be helpful at this time

or if you prefer you can instant message me over aol instant messenger at the screen name "thelonetree41"

and it is on an 802.11B wireless standard network i am trying to connect to

motherboard: biostar M7VIG pro(d)
processor: 1.4 GHRz AMD duron processor
wireless network device: compex WLU11A through a USB port
dual monotor support enabled
DSL ROUTER: linksys wireless b router
OS: Windows xp professional (build 2600)