Exclamation [Q] Help cyanogenmod galaxy s4

I install CyanogenMod on my galaxy s4 everything works perfectly but nesecito help with something called perfectly when I call but I have a problem

the problem is that when I finish the call does not close the call hangs and hangs but never

I loved this rom but help me with this problem and thanks in advance and excuse my bad English use google translator because they do not speak English properly