How do I configure, in SmartVNC, the behavior of the remote PC when disconnects?

When I disconnect, my remote PC "logoff" the current user, which is undesirable.  I want to be able to set "lock the workstation" (among other logical choices), if possible.

Any thoughts/suggestions?

Thanks,
Nick

I'm actually not aware about such Terminal Server behaviour at all. It eaither disconnects a client due to broken connection or when user selected the Disconnect command and Logoffs the user if logoff command was selected.