Default [Q] Xperia U - wifi and bluetooth won't start

Hello,
i searched for a solution bu reading a lot of topic, but i didn't found something really working for my problem, i was on GB rock with Bootlocked, and one day wifi and bluetooth was not working, yesterday i have unlocked BL and flash a new rom (Miui V5 from this forum), the wifi and bluetooth still not working ..
there is a way to fix this problem ? flashing a specific kernel ?

thx for the help
Best regards
Chris