Default Cant connect to Mobilego

Hi
I have 3 phones. My Galaxy S2 connects to mobilego fine.

The LG G3 D855 and the sony z2 d6503 wont connect.

The LG usb debugging is on, but it turns grey when I plug in my phone.

The sony z2 does not grey out but still does not connect.

In security I have checked 'unknown sources and unchecked 'verified apps' as well.

Both have kitkat 4.4.2. Kernal 3.4.0.

Please help!

Oh, And I'm a NOOOOB!!!