[Q] Xperia U Bootloop problem Thunder_Strike JB topic

I was Terarom v6 ICS. I flashed Experimental-U-12 http://forum.xda-developers.com/show....php?t=2326515 with flashtool and installed Thunder_Strike JB http://forum.xda-developers.com/show...461791&page=37 but now i am stuck at boot :( whats the problem?