Cannot locate the CD-ROM

"Cannot Locate the CD-ROM: Please insert FS2004 Disc 4, select OK and restart application"
Everytime I want to play FS9 I have to restart my computer with the disk in. It's funny because most people have a ton of problems with FSX, but for me really, FS9 is a serious pain in the ***! I've tried just about everything. I've had this problem before but it does it more frequently now. I use an unlicensed disk, but it is verified in the game. No it is not illegal to have an unlicensed disk so shush. Any ideas on what to do? I'm lookin' into that no cd crack because I have so many problems with the disk.
Everytime I want to play FS9 I have to restart my computer with the disk in. It's funny because most people have a ton of problems with FSX, but for me really, FS9 is a serious pain in the ***! I've tried just about everything. I've had this problem before but it does it more frequently now. I use an unlicensed disk, but it is verified in the game. No it is not illegal to have an unlicensed disk so shush. Any ideas on what to do? I'm lookin' into that no cd crack because I have so many problems with the disk.
