Default Problems rooting HTC Status AT&T

I bought an HTC Status AT&T unlocked (I am currently in Germany) and try to root it, in order to erase all anoying AT&T apps and link SD to have more memory.

I read and try a lot of stuff to root it but still stuck on the first step: having S-OFF. For example using HTCdev to unlock the bootloader works just find, without throwing any error, but no getting S-OFF.

The info of my cellphone is:

Android: 2.3.3
HTC Sense: 2.1
Software: 1.23.502.1

If any further information is needed just ask.