Default Apn settings problem on Moto g with cyanogenmod 11

As I said I have a Motorola Moto g with cyanogenmod 11 snapshot 20140504 M6 installed, the problem is that when I try to add apns I save them and then the settings are in blank. I really love cyanogenmod and I don't want to go back to stock rom but I want to have 3G. Please does anybody know how to fix it?

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