Broadband

Hi, could somebody please help a Newbie!
How do i setup a broadband connection so that everyone on the network can use it? I have the line coming in to a speedtouch 510 router with 4 ports. I can connect single computers but then they lose network or vice versa. If i connect a patch cable from the router to the network switch then the work stations still dont get internet. Probably something really easy!
Many thanks


=?Utf-8?B?TmV3Ymll?=