Why is skype immediatly ending my calls an iphone?

My friend and I skype all the time. However now, everytime we try to call/or vid call on skype, we answer and then it immediatly ends the call by itself and says call failed after. We already considered all the usual options, and its weird because the day before we skyped on and off throughout the day the day before the problems started. We uninstalled skype and installed, restarted our devices (I have an Iphone 4 IOS 7 and she's on an Android Hawaii or close to that) Restarted our routers, removed eachothers contacts and added, turned cell data off, restored my network data.
(P.S i'm pretty sure its not our devices because I tried with my ipod 4th on ios 6 with different settings than my iphone and the same thing happened)
I HAVE NO IDEA WHAT TO DO.
Is it her network?
Her device?
Mine?
It was working fine the day before and neither of us changed anything or updated anything, and her siblings can facebook me snapchat whatever, its just skype.

Make new ids and if the problem continues then its either your device or your internet service.

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