[DAVID GAGNARD]

Steve;

I would start the process of elimination,my suggestions would be as follows;

1. take out the thermostat completely and take off the radiator cap and see if you have water flow thru the radiator....
2. get another water temp gauge and stick the sending unit probe into the top of the radiator as the water flows in and check the temp of the water coming into the radiator...

If all checks out replace the thermostat and try again...You may also want to check out the temp gauge in the car,you can take the sending probe out of the intake and stick it in a small pot of boiling or near boiling water to test it......

hope this helps..........

David