Thanks..

[Zach Manring]

Thank you Cliff.. The one by on script works on the tower..

set the_folder_path to alias "PDFProofs:"
set days_old to 8

set this_date to current date
set weeks_old_in_seconds to days_old * days
set too_old_date to this_date - weeks_old_in_seconds

tell application "Finder"
    activate
    set fileList to (every file of folder the_folder_path whose creation
date comes before too_old_date)
    repeat with i from 1 to count of fileList
        set thisFile to item i of fileList
        delete thisFile
    end repeat
end tell