Non admin users cannot logon to Citrix PS4.5 with RDP

I had an issue where we had to logon some users to a Citrix Presentation Server 4.5 via RDP as the VPN tunnel from their remote site was down, it was a temporary workaround but when we connected via RDP we had this error displayed.

"Connection Error : The desktop you are trying to open is currently available only to administrators"

This is related to the Terminal Server Configuration and the RDP Listener, under the Citrix Settings is a check box that says "Non published applications for Administrators only". This means the Desktop as this is a non published application and in my case my users needed the Full Desktop.

I removed this check box and they could logon as normal with RDP.