Aerohive does not have explicit support for Skype Wi-fi. From what I've been able to find out, this is a separate app to help you find a public hotspot and to pay their connection fees using Skype credits. Then, you use the standard Skype application to initiate your calls.
Aerohive does not yet support what I believe is the underlying Hotspot 2.0 protocols and algorithms, although we do have intentions to do so next year.
Skype itself works just fine across an Aerohive wifi network.