If your hub is in fact acting as a DHCP server than the DHCP server functionality needs to be turned off the router. Turn it back on as a DHCP client.
Have you considered putting the router in front of the hub? As in link from modem to WAN port on the router, PC port on router to the hub.
Edited by Titan8990, 18 July 2008 - 04:11 PM.