rrrrr, i am pulling my hair out - picture rotation

Here is what I am trying to do:

Open a PowerPoint file (a generic sample I made - only one slide long)
insert picture

rotate picture 90 degrees --(any direction) ← This is where I am having problems

Send the picture to back of the slide, meaning that the inserted picture will be behind a second picture

Thats all

tell application "Microsoft PowerPoint"
	set visible to true
	delay 2
       --Open existing ppt file
	open "HDisk:script_demo.ppt" -- this ppt file has a title bar a picture
	set mySlide to slide 1 of active presentation
	delay 2
        --This will import a picture (file name can be any directory and file)
	set picture1 to make new picture at the beginning of mySlide with properties {file name:"HDisk:DSC_2027.jpg", top:100, left position:200, height:300, width:300}
	delay 2

--This will rotate the image 90 degrees
	set rotation of picture 3 of mySlide of slide 1 of active presentation to 90 --This does not do anything
	--set rotation of front graphic object to 90
	--rotation picture1 rotation 90
--This will set the imported picture to the back of the ppt
	delay 2
	z order picture1 z order position send shape to back
end tell

Model: Macbook
AppleScript: 2.0
Browser: Safari 3.0.4
Operating System: Mac OS X (10.5)


Try this for a clockwise rotation. Place a “-” in front of the “90” for a counter-clockwise rotation.

rotate picture 3 of mySlide of slide 1 of active presentation to angle 90