After trying many Roms on my phone, I decided to go back to stock due to the instability some Roms have. Now heres where (I think) the problem is. I had made a backup way back in July or so, running stock Android 2.1. I decided to flash this backup and work from there. So after flashing the backup, i got a notification for Android 2.2. and updated to it. After the installation, i received another notification for 2.2.1 and updated to that. Did I lose root while switching from 2.1 to 2.2? I still have the superuser app but it does not load. In rom manager i cannot do anything as an error message pops up saying "Cannot run the privileged command". In SetCPU I get a message saying it could not obtain root access. I have tried factory wiping but this does not help. Any suggestions? Thanks.