Why does my PC get booted out of the network after shutdown

Using XP home on one of my pc's and its hooked up through a router. Evertime i restsart the puter i have to run the network wizzard to get back on line...or to network with the pther pc's. i have 4 on the router in all and mine is the only one that has this problam..

any suggestions??

thanks,


Ed