Applescript - won't work when used as a droplet - applescript

Question

I'm trying to create a script to use as a droplet where I drop a file onto it, automator opens it in Adobe Acrobat, then applescript runs an action inside of Acrobat to save it as an optimized PDF into a specific folder, then opens that new file in preview and uses a quartz filter to reduce the size of the PDF.
If I have a file already open in Acrobat and just run the script, it executes the action within Acrobat, saves the file, then opens preview (haven't gotten any further). But if I drop the file onto the droplet it just gives me an error message.
Here's the code:
on run {input, parameters}
tell application "System Events"
tell application process "Acrobat"
tell application "Adobe Acrobat Pro" to activate
-- runs the custom action in Acrobat
click the menu item "SAVE in 0-SEND" of menu 1 of menu item "Action Wizard" of the menu "File" of menu bar 1
end tell
end tell
tell application "System Events"
keystroke return
-- clears the action finished message
end tell
tell application "Adobe Acrobat Pro"
activate
close documents saving no
quit
end tell
-- this doesn't work yet
tell application "Finder"
tell application "Preview"
open input
end tell
end tell
end run

Answer 1

I would recommend something along these lines...
on run
set aFile to choose file with prompt "Please select the file to process"
processPDF(aFile)
-- cleanup, quit the application
tell application "Adobe Acrobat Pro" to quit
end run
on open (theFiles)
repeat with aFile in theFiles
processPDF(aFile)
end repeat
-- cleanup, quit the application
tell application "Adobe Acrobat Pro" to quit
end open
on processPDF(theFile)
-- open your file
-- do something with theFile here.
-- close the file
end processPDF