How do you get two BT home hubs working on the same connection?

I have two BT hubs and want to provide wired broadband to two computers in different areas of the house. I already have phone cable in each area but when connecting the two hubs they cause a conflict and the broadband disconnects. I have tried to switch off DHCP on one hub and allowed the other to configure that, but still it is buggy. Any suggestions would be appreciated.