Odometer is not working after replacing the instrument cluster?

I had to get a used instrument cluster, the one in the car had been completely shorted out. Mother board on the back of the cluster had so many breaks in the wiring it needed a body cast. I made sure I matched the exact part number and after I installed it everything seemed to be working fine. I did have to replace odometer gear, which was easy to do really, made sure it was properly lubed. It worked for about 1/10th of a mile a stopped working. I did have the car scanned and it said vin number and mileage didn't match with cluster. I was told that that could be why the odometer isn't working with the new gears installed. How or can I correct this issue?