Need some help with my Messiah 2......

[gtapex_trueno]

Hi. I started off the day by going to work, doing some work, and then decided to play some PS2. Anyway, I decided to play some Ape Escape 2 (Love the game ). After playing for a few hours (w/out the boss seeing), I tried to pop in one of my backups (I don't carry my originals around, except Ape Escape 2 I borrowed from my friend). I got the bloody red "Please insert a Playstation or Playstation 2 Disk". I tried all my other backups and to no avail, I got the same screen. I tried everything! Then I figured that I wouldn't be able to play my backup movies, so I popped one in (Agent Cody Banks). The damn thing worked! So I tried a backup game (Gundam Seed), and nothing except the red screen. I tried other backups which worked in the past, but none worked. Could someone please help me? I've got a:

V7 Messiah 2 Pro installed by freedomlives
Using Ritek DVD-R 4X and TDK and Phillips CDR

All my backups worked before, but now none of them work! Could some please help me? I looked all over for a boot process or something, but couldn't find anything that helped. Please help me! Can't spend another day at work doing nothing but.....work!