I am the person who originally posted this question. I was in touch with Chuck
Dome, the sim designer of the Cessna 402 aircraft (ces402.zip). He told me to
use an editor like notepad and remove the line in the PANNEL.CFG file that
gauge37=atrm, 0, 0
Save the file.
This fixed the problem and the plane is flyable.
One other warning to those of you who want to fly this plane. the views out the
right window(Shift + 6), left window(shift +4) etc. are not available. When I
use these commands it crashes my computer. I don't think these would be too
hard to add.(Famous Last Words!). Thanks everyone for your suggestions and