gauges

Hi, Could someone point me in the direction. I need to fix my gauge problem. I have downloaded several aircraft over the past couple of years. I am far from any kind of expert but have always had o.k. luck. The other day I downloaded a p-38 from the site and lost all of the gauges on some planes. Some of the gauges on others. And some weren't affected at all. I tried re-downloading the Concorde package but it didn't fix the problem on that aircraft.