Cannot Take Control w/Remote Assistance.

[tiatee]

I am on LAN connections here at work. We use Remote
Assistance quite frequently using the Take Control
option. The issue I have with this particular user
is........Connected via remote assistance using two admin
accounts, looks like it automatically connects at "Screen
View Only". When I try to Take Control, get the
message "Control of Remote Computer is Not Allowed".
Checked all settings (under System Properties\Remote)and
they are all set to "allow remote assistance". Anyone
else with this issue. Does MS Instant Messanger change
any settings. That is the only additional thing this
user has installed.