Entourage add prefix to reply

Hi,

I work at a support department. The subject of every mail we reply gets a tracking number. Now this happens with copy-pasting. I want to make a script that, when the reply is open, if i run it from the script menu:
1 reads the current subject
2 adds a prefix to it
3 change the subject to the new one with prefix

For now, I have this:


tell application "Microsoft Entourage"
	if the class of the front window is message window then
		set theMessage to the displayed message of the front window
	else if the class of the front window is draft window then
		save the front window
		set theMessage to the displayed message of the front window
	else
		display dialog "Fail te select active message"
	end if
	set theSubject to subject of theMessage
	set thePrefix to "Prefix"
	set the subject of theMessage to thePrefix & theSubject
end tell

The reading the subject part works. But the part to change the subject to my subjects doesn’t. I get no error.

I work on OSX 10.6.3 with Microsoft Entourage 2008 for Mac, version 12.2.2