TPMS light problem

I bought aftermarket rims and tires, due to bad factory rim. I had a yellow warning light on the dash when I got the car. I figured it was because there was a diffrent rim on the car without a sensor. I went out and bought four new sensors and valve stems had them installed. The light was off then I reset the light by having key in the #2 spot and holding down the tpms light button until the light went off on the dash then I started the vehicle and drove it light stayed off. I went out a little while longer started up the car the light is back on. Im not sure what else it could be or maybe there is a diffrent way i need to reset the light??? please help.