So were do I start. A month ago everything was going great. everything was working perfectly. But now nothing is working right. I have an xbox v1.1 with a matrix modchip installed, Im using the xecuter 4977 bios, evox dashboard installed off of the slayers 2.1 disc, i have the phillips dvd drive, and a stock HD. The backups Ive made of some games say that there is NO DISK when i put them in the xbox. I FTP to my xbox and transfer them straight from the disc. then when its on my PC i patch the game using zbx tool 1.3. then i make the ISO using simple xiso v03. then i burn them in nero v6.0, i go to recorder->burn image and then select the iso and burn them onto TDK 2x DVD-R. I tried to backup my project gotham racing 2 game that way and i also made the ISO with creation 3.1 and it auto patched the game. then I tried to use record now max v4.1 but i got an error message a bunch of times before it started writing, and during writing a couple of times. i tried it one more time with the ISO i made with creations, I burned it with the same brand of dvd-r's, but this timei used nero and went to dvd udf/iso mode and then burned it to disc, when i put it in the xbox it says either unknown or no disc. I have all the IGR turned off. the only thing i can think of is the discs are bad. Ive made other game that work alright on the same dvd-r's and using the first method. I can't get crimson skies and some multi game discs that used to work, but don't work anymore. I also heard of the dvd rom lazer getting offset, but if adjusting that can be avoided thats great. If anybody knows what i am doing wrong or if any thing is wrong with my xbox. all the help is very much appreciated. Thank you!