[AS][CS2] A transparency flattener object in Acrobat 6 ... - Adobe Indesign

I made an script that looks at all the flatteners, check for a unique one and if it is not found it makes the needed flattener. But I use it for saving eps files of each page. I look into the saving of pdf with CS2 and the flattener is grayed back unless you pick pdf 4. I don' t know why.

here it is if it helps

tell application "Adobe InDesign CS2"
activate

set theFlattners to (get name of flattener presets) --as list
set TheSeeked to "MS_2400Flat_300Grad"
set TheFlattenerFlage to false
repeat with an_item from 1 to count of items in theFlattners
set an_itemofTheList to (item an_item of theFlattners) --this retruns the item's name as a list
if an_itemofTheList = TheSeeked then
set TheFlattenerFlage to true
exit repeat
end if
end repeat
if TheFlattenerFlage is false then
my The_Flattner()
display dialog "The needed transparency flattner" & return & "MS_2400Flat_300Grad, has been made." giving up after 1
else if TheFlattenerFlage is true then
display dialog "You had the needed transparency flattner," & return & "MS_2400Flat_300Grad." giving up after 1
end if

--do stuff here

end tell

on The_Flattner()
tell application "Adobe InDesign CS2"
set HighResFlattnersPrefs to properties of flattener preset "[High Resolution]" --just the one to start with needed
set HR_FlattnerPrefs to {clip complex regions:false, line art and text resolution:2400.0, gradient and mesh resolution:300.0, name:"MS_2400Flat_300Grad"} & HighResFlattnersPrefs
make flattener preset with properties HR_FlattnerPrefs
end tell
end The_Flattner

SN