OK, I figured this out..... I am running the RUT server on Server 2008R2. It seems as though once I stop and restart the services on the RUT server, I can then, click on any host in the viewer. If the Rut server sits dormant for any amount of time, I have to go back and restart the service on the server before it will allow me to remote in to a host.
Our developers are currently looking into the information and log files that Rob had provided regarding the issue. However, please note that similar issue had occurred in the previous version of RU Server (3.1) for some users - this issue was already fixed in the most recent update for RU Server (version 184.108.40.206) which resolved the issue for everyone who has reported it to us before the update was released. Perhaps, in this specific case the issue might be caused by something else.
Meanwhile, you can try updating your current RU Server installation to the most recent version 3.2 - the issue should not occur after the update since it was already fixed in the latest update, but even if it does - we will make sure to assist you in resolving it as fast as possible and you can always temporarily downgrade your RU Server back to the previous version without losing any connections/settings.
The latest version of RU Server 3.2 is available for download on this page.
I avoid mass installations of a product not widely deployed or not used for some time. It takes a lot of effort for our 2 person IT department to fix issues; our last attempt to upgrade our 6.x installations to 7.x hosts ended up with us having to manually uninstall/re-install/fix 100 installations!
I do not know if that issue was fixed or not, but since there was this user report about possible issues, I'll wait for a month or so to see how it goes from your end.
Of course, please feel free to keep using your current installation. Meanwhile, we plan to release an update for RU Server very soon and hopefully we will be able to completely eliminate this issue in the upcoming update.
Please feel free to let us know if you have more questions or need our assistance.