Xperia S - Custom ROM. Can't root?

view story

http://forum.xda-developers.com – I flashed a custom ROM to my Xperia S. Du@l ROM. After I flashed I lost CWM and Root... I tried to root it again using the auto root tool from bin4ry but it didn't work at all... Now I'm stuck can anyone please help. Cheers (HowTos)