Lumia 630 Skype Problems

[WPCentral Question]

I have Lumia 630 and everytime I try to call someone on Skype, the calling screen pops up and there's no ringing, it's just a screen that pulsates, the one that pulsates when it's about to call. When I try to hang up, everytime I try to touch the red "hang up" button, my screen goes blank for a second and then it immediately pops up to the same pulsating state like before. I have to give it at least 20 tries for it to work. Please, help.