Default CM11 - cant turn on "Data" anymore

Hello everyone.

I flashed this ROM: on my Xperia U.
First few days was perfect, I was tunning phone with Lucky Patcher, Titanium Backup and Tasker.
Last 3 days, I cant turn "Data Traffic" on.

Does anybody have idea what could be a problem?
Tasker is off (I was trying to setup to turn Data on in some exact time and also turn it off), any command to turn Data on wont work.
To not be missunderstund - Data is on but phone dont have "Data Traffic" signal at all.

Any suggestions is welcome.
TY for your time!