Help No rotate back to vertical with cyanogenmod 10.1

[tson_]

What I can do ? I have es task manager too, I don't know it's influence or no ?
somteimes go back... but much times no rotate back and phone don't care what is set in settings.. if auto rotate enabled, if not the phone rotating... when rotated to horizontal the phone can rotate 2 way but no horizontal.. I must press back button to get vertical screen... hope understand
help