Default [q] mtd install system reboot failure

ok please tell me what on earth went wrong here. I was stock deodexed el30 rom.. i tried install the zip of clean gb mtd, and when i did the system reboot, it rebooted right back to cwm 5 (the one that i currently have). am i missing something here? i thought when you go from a bml rom and install an mtd rom (other than cm7 or 9), that it should automatically convert.