Can't make calls on Facetime
I have linked my husbands e-mail and mine to my Apple ID and on his I-Pad made sure that both are selected to receive calls and his e-mail as the Caller ID for outgoing calls. It has been verified. Problem is he can receive from my Macbook Pro, but not make a call. He gets the error that I am unavailable. Any help would be appreciated as I would like to not have to make the drive to the Apple Store because of the distance involved. Without paying for tech help on the phone the guy told me that I seemed to have everything set up right so he was not sure what the trouble could be.
iPad (4th gen) Wi-Fi, iOS 6.1.3