I've checked the forum, found something relative but didn't help.
I have my Nexus S rooted for about 2years. I have changed a lot of ROMS with no problem ever.
About some months ago I flashed a new kernel so I can read usb flash drives. That didn't work.
But my phone was working right.
Then I realized that I don't have root permissions.
I don't know if that is the problem and if that is indeed the problem I can't find the original kernel so I can make it rooted again.
I have tried flash cwm6.0 and then new superuser.zip all installed fine but no change to my root permissions.
thanks in advance for any help.