Have you tried reloading the aircraft?
just go to select aircraft and select the same one again.
if that doesn't work, try reinstall the product...
if that doesn't help either, try redownload and reinstall with the new file...

hope you get it fixed, it really is a lovely aircraft!
Tyrion

I purchased the C-130 and loaded it onto FS2004 running XP. I needed more memory so I bought a brand new gaming computer running Flight Simulator X on Windows Vista. When I try to load the program I get messages saying to please insert the CD-ROM. I bought a new copy and I get the same message.

can I get the C-130 installed on Vista and FSX?