Fuel Gauge Trouble Shooting Help Needed!!

Alright here is the deal, the gauge on my 73 Duster hasn't worked in a while, so I assumed the sender was bad, got a new one, installed it and put gas in it 6-7 gal. and it still didn't read anything. so first i checked the ground to the sender by hose clamping a wire to the sending unit and directly frame grounding it. Still nothing, so I made a jumper wire from the ground to the sending unit wire and turned the key on and it shot up tp full, I then checked the new installed sending unit with a ohm meter and got a reading of 44ohms. but nothing at the gauge. what could I check next??