Bridges — those still in use ??? ;-) Last time I recall something specifically labelled a “Bridge” was in the 90’s. What exactly are you trying to do in this IP-only world?
BTW — You need to give some more info if you want a decent answer. Also, is this really W2K3 specific as in “this works in W2K or WXP but I can’t get it to work in W2K3” or should it have been posted in the “General Networking” forum?