Changing N-Number

In Photoshop CS I changed the N-number on a plane. When I opened it in FS9 the plane's textures weren't there, or something. It looked as though the texture didn't load. Any ideas? Thanks
Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=15&t=35705