RemoteApp Disconnected - Your remote desktop session has ended

I setup a TS server and published two remote apps.  When I lauch the first app from outside the network everything is fine.  When I launch the second one I get the following:

"Your remote desktop session has ended."

Another use connected to the remote computer, so your connection was lost. ....."

I have restricted each use to a single session so I assume this is causing this.  Is there any other way around this?

Thanks

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Costas Tsaklas - http://costas.cpstechgroup.com