Problem connecting to AlwaysOn Cluster
Microsoft Azure completely ignores IPs of any internal network on Azure, if you want any computers to connect to a listener in an AlwaysOn availability group make sure 100% sure you specify the VIP, Virtual IP, of the Cloud Service and not the internal IP of the cluster. You will not be able to connect to the cluster or to the listener.

When on the Dashboard view, note the address shown under Public Virtual IP (VIP) Address.
Completely ignore the internal IP Address for listener configuration.