96 front tank problem

i have a 96 with a 302 and dual fuel tanks.i was wondering if there are any common problems with this system?my problem is when i switch it to the front tank it will not start its full of gas and the guage reads on empty.also when turning the key on and off you cant hear the pump engage.im hoping since the sending unit seems not to be working eithier that maybe it will be somthing simple.thank you