I have a second hard drive devoted to FS9. The command to install crew in the Challenger (/), does not work. I am not computer literate enough to understand why. It works fine on the "main" drive "C". As far as I can tell everything else works fine on "D." I can only assume some file that is loaded on C is missing on D. The command works perfectly on C. I've deleted and re installed the aircraft on both drives. Works on C will not work on D.

Any Ideas?

Thanks in advance
Barry