What would/could cause a Win2K Server running DHCP service to assign subnets to clients that is not the subnet the server is on? In other words, say the Win2K server is on subnet 255.255.255.0 but the subnets it assigns its clients is 255.255.0.0.

The network in question has a router to handle broadband net connections and the clients are a mix of WinXP and Win2K Pro.

Any help is appreciated. Thanks!