I have read many tutorials, and every post from every forum relating to this problem: I have burnt 10 backups, the first 2 did not play but were burnt at 16x then 8x, now I only use 2.4x were all burnt using CloneCD, but only tombraider anniversary will play in my xbox, all the others are get "not recognized/dirty disc" error. I checked the ISO's using XVDV Mulleter, and all the boxes are checked, am using clonecd 188.8.131.52, verb dvd+dl, my writer is Liteon LH-20A1P with latest firmware (KLON), and I have set book type to DVD-ROM. I never get any errors during burning, they just dont play. I just ordered 2 more spindles of verb's and want to start getting it right because I already have a matching set of coasters! Any help much appreciated. LAF.