Default no service

I have rooted my galaxy ace 2. Firstly i had a problem with CWM to install kitkat but when i installed JB 4.3 CM it updated to and i finally instaled my kitkat 4.4.4.
After a while i noticed that i have no signal at all. I looked@google and i even cant switch type of network( GSM etc) it just says "unknown"
i tried all, even i installed all version of kitkat, now im still back @ JB with no succes
Could you help me? what could i more do? my IMEI all right