Panel Problem: AP Alt, Hdg, Ias increases by tens

I downloaded and installed the Citation Panel from Simviation and whenever I try to set the Altitude, Heading, or Airspeed the numbers increase or decrease by tens or hundreds. For example, if I want to set an Altitude of 15,000, the first couple of clicks will turn the hundreds. The next click will change the thousands . The result is 15,200 and I cannot drop the 200. Is there anyway to fix this? If I want a heading of 083, I can't get it. The clicks result in changes of 10. The closest I can get is 080. After a couple hundred miles that makes quite a difference. This is extremely frustrating and I would welcom any advice on hoe to remedy this irritating anomaly.