I hooked up my new honeywell RTH230B thermostat and the heat seems to be working, but the airconditioning won't come on. I hooked the W to the W, the Y to the Y, the G to the G, the R to the Rh and the C to the Rc. At first I tried it without the jumper between Rh and Rc because that's what it said in the instructions, but I also tried it with and it still didn't work. Any suggestions?