Remote control breaks remote desktop connection/session

At Windows7, when trying  to remote control windows 2008, the original  remote desktop connection broke up and popped out message to ask for help:
" Remote desktop session has ended, your network administrator might have ended the connection , ..."
...

--> rdp and remote control  resource settings(bandwidth, color resolution, ..)  have to be the same

[try]
windows update (KB969084)
http://www.microsoft.com/downloads/en/confirmation.aspx?familyId=72158b4e-b527-45e4-af24-d02938a95683&displayLang=en

Terminal server settings
http://social.technet.microsoft.com/Forums/en/winserverTS/thread/87fc497a-27fd-4a76-ab59-ea5fe01c9091