Dan,
Will the pilot light at all?
Do other gas powered appliances work?
With the "Switch for electric off" does the refer light come on?
You say the switch for electric is off.... Is there another knob for gas, or does it say gas on the other side of the knob for electric. If it says gas and electric on either side of the same knob you may not have the refer in the gas mode. Keep on turning and it will go to the gas side.
Here are the lighting instructions as I remember them from when I had a standing pilot refer.
While holding the safety the saftey valve on, you should be able to light the pilot. The pilot will be directly under the thermocouple. Once the pilot lights you need to continue holding the safety valve in the on posiotion for 10-12 seconds. This is to allow the thermocouple to tell the safety valve it is ok to let gas flow. Once you let go of the saftey valve the main burner should ignite, and the pilot should stay lit.
Here is a link to manuals on almost all dometic refers. There are troubleshooting flow charts and detailed repair instructions.
http://www.bryantrv.com/docs.html