Cisco Fiber to Fiber Connection Not Ping DHCP?

We have a cisco 3560 with the four mini gbic modules. The modules 1 and 2 are setup to make a ring around our campus. modules 3 and 4 were not used. we also had a 3com 1100 with a 100MB fiber module on the back going to another building feeding into a 10/100 fiber to ethernet module then to a dumb switch. we decided to up that link to Gb and so we plugged into the 3rd Gbic on the 3560. it was preconfigured by our old admin with vlan 3. gbic 1 and 2 are on vlan 2 and gbic 4 is on vlan 4. I took a 2950 over to the building and plugged the fiber going into the 10/100 ethernet converter into the 2950 gbic. setup the Ip and gateway. I get green link lights on the gbic in the 2950 and the 3560 and status reports "line protocol link status up" but when i connect my laptop the ethernet comes back limited or no connectivity. I am not getting dhcp. i setup the default gateway in the 2950 via the web interface. *note: the only way i could get to the web interface was to set the ethernet adapter