Deep recommended:

2) Replace with:

open "Unix", 1, "rm -rf /Soft/Optimafiles/*"
close 1

----------------------------

Thank you Deep for suggesting a solution similar to what I've 
previously recommended namely using AppleEvents.

Piet:

Here is an AppleScript for testing Deep's Unix-approach:

--------
set the_dir to choose folder with prompt "Select folder to be deleted"
my remove(the_dir)

-- delete a folder and its contents
on remove(the_path)
	try
		do shell script "rm -rf " & quoted form of (POSIX 
path of the_path)
	on error
		beep
	end try
end remove
--------

Just copy the above code to an empty Skripteditor-Window and start the script.

Furthermore and as recommended by already others you really should 
consider using a folder "Optimafiles" in the user's temp-folder.


Best
-- 

                   Herbie

          ------------------------
          <http://www.gluender.de>