Moving a layer in Photoshop CS5 using Applescript

I have a layer in a document called "logo" and i want to duplicate it to every open document and then move it to a specific spot in each document

I got the duplicating thing happening but cant seem to move the bounds of the layer (says it is read only and cannot be changed)

here is what I have written

tellapplication "Adobe Photoshop CS5"

activate

settheDocstocountofdocuments

repeatwithifrom 1 totheDocs

duplicateart layer "logo" ofcurrent documenttodocumenti

endrepeat

repeatwithifrom 1 totheDocs

setcurrent documenttodocumenti

telldocumenti

setboundsofart layer "logo" to {0.456666666667, 6.38, 2.88, 6.77}

--Adobe Photoshop CS5 got an error: Property is read/only and cannot be changed

endtell

endrepeat

endtell