I got my 360 flashed last week. I burned my own games. Now some worked the first and second time. However, after that they work once more, by putting in an original game. Then, they dont work at all. And some games dont work the first time unless i put in an original game.

I am using Verbatim DVD+R DL disc. I am using XBOX Backup Creator, and CloneCD. Is there something worng with what I'm doing, or do i need to get my 360 re-falshed?

Which DVD-ROM drive in your 360 and which firmware revision does it have? Which burner and firmware revision are you using? Are you setting the layer break at the proper place? Have you tried IMG Burn?

With some of the firmwares you controll the drive speed by putting in an original disc. This may explain why it helps to put in an original and then the backup.