Using applescript how do I set the angle of a gradient

Question

Using Applescript I need to set the angle of the gradient to 90 degrees. I've tried everything I can see in the scripting guide.
This is a sample of the script I'm using to set the gradient all I need to know is where and how to set the gradient to horizontal. Please forgive me as I'm a real newbie at this!!!
tell application "Adobe Illustrator"
    activate
    make new document
    set ellipseRect to {100, 100, 500, 500}
    set ellipseColor to {cyan:0.0, magenta:100.0, yellow:100.0, black:0.0}
    set myellipse to make new ellipse at beginning of current document with properties {bounds:ellipseRect, inscribed:true, reversed:false, stroke color:ellipseColor, fill color:ellipseColor}
    set Doc_Ref to the current document
    tell Doc_Ref
        if not (exists gradient "My Gradient") then
            set This_Gradient to make new gradient at end with properties ¬
                {name:"My Gradient", gradient type:linear}
            set properties of gradient stop 1 of This_Gradient to ¬
                {midpoint:50, ramp point:0.0, color:{cyan:0, magenta:50, yellow:100, black:0}}
            set properties of gradient stop 2 of This_Gradient to ¬
                {midpoint:50, ramp point:100.0, color:{cyan:10, magenta:100, yellow:100, black:0}}
        end if
        if exists path item 1 then
            set fill color of every path item to {gradient:gradient "My Gradient"}
        end if
    end tell
end tell

Answer 1

I think I the gradient angle property is broken, try rotating the object setting all the "change" properties to false, except changeFillGradients.
rotate
(angle
[,changePositions]
[,changeFillPatterns]
[,changeFillGradients]
[,changeStrokePattern]
[,rotateAbout])