Can't save a new paint and texture. Vista

Hello all.I tried to add the Comair paint to the CRJ default, and couldn't do it. I've done it many times in XP in the past. I copied the cfg and put the texture in the correct place. However, when I added it to the config (xx = 4), Vista wouldn't let me save it. Am I missing something here? This is the first new paint and texture I've tried to add to FSX in Vista, but, for the life of me, I can't figure out why I can't add the texture. I used the next available number in the cfg. for the new paint, and thought everything was normal.Anyone have this glitch happen to them?I'd appreciate some advice. Stan