Yeap happens to me now and again
However a few things on TS
u should b able to reconnect to a disconnected session check terminal server
settings for that
if still problems then go to commandline
QUERY
for a list of ts command line cmds
query user
to show users on the system
to logoff a session
logoff
Terminates a session.
LOGOFF [sessionname | sessionid] [/SERVER:servername] [/V]
sessionname The name of the session.
sessionid The ID of the session.
/SERVER:servername Specifies the Terminal server containing the user
session to log off (default is current).
/V Displays information about the actions performed.
note using the cmd takes quite a while before the user is logoff so dont panic
when it hangs at cmd prompt for a few minutes