Pictures of desktop no longer possible upgrade 10.5 10.6 on blind server

Question

I have a script (the script is not the problem) that starts the TeamViewer application on my blind server and then makes pictures of the running application and sends them per email to me so I can see it is running on my server.
Under 10.5 it worked always (still does), under 10.6 it does not, I can hear it make the ‘click’ sound but no picture appears on the desktop (btw the script is fine so that is not why I post here). Also using the keyboard commands, when logged in to the blind server, produces the ‘click’ but no pic.
Here is the script for the record:
set dFolder to "~/Desktop/"
do shell script ("mkdir -p " & dFolder)
repeat 2 times -- Repeat XX times.
activate application "TeamViewer"
delay 1
set tTime to do shell script "date +%H-%M-%S"
do shell script ("/usr/sbin/screencapture " & dFolder & tTime & ".png") -- Capture screen.
delay 5 --
end repeat
Now what I found is that if I connect a screen to the server it makes the pictures in both ways. No screen no pic. conclusion the availability of a screen effects the whole procedure.
Any idea how to fix this?

Answer 1

I'm wondering if it's related to upgrading to 10.6 rather than starting with a clean installation or to restoring user files from 10.5 on a 10.6 install? There was a similar problem I experienced after using Time Machine to restore my user files and account after a clean 10.6 install.. I was nolonger able to use the system's screenshot function (appleshift3 or 4). I mean, I could use it, but if it wasn't sending the data to a file, using the ctrl modifier so it would send the snapshot image directly to the clipboard. I used this function under 10.5 to copy backgrounds where an icon was to be placed for something I didn't want visible and paste the background into the file's icon in file info. Well after using Time Machine to restore my 10.5 user data, somehow 10.6 nolonger works to paste from the clipboard into the file icon. I had to resort to using the regular snapimage to file function, open the snapshot in preview, copy to clipboard in preview and then paste over the file icon in file info. I even talked to Apple about this problem and they couldn't figure out what was going on.. Something from 10.5 in user preferences files disables clipboard functionality used by many applications in strange ways... I gave up trying to fix this problem...