Photoshop Overwrite exisiting file

Question

I'm using this line to write over an exisiting document if it exists already
  save in (localBrandFolder_PSD) as Photoshop format with options myPSDOptions without copying
This doesn't give the expected behaviour.
Previously on other applescript I have used it in this was
save in (localBrandFolder_High_Res & name) as JPEG with options myOptions with replacing
As you can see in this script it turns green and hence won't work.
Any pointers please
Mat

Answer 1

This might help, this is the beginning of the script.
property type_list : {"8BPS"}
property extension_list : {"psd"}
script o
          property theseNames : {}
end script
-- empty log file
do shell script "echo  'Files not processed in Photoshop :'  > ~/Desktop/LogPhotoshopError.txt"
set noError to true
--Setup list of folders and process details of folders
set dtF to paragraphs of (do shell script "ls -F ~/Desktop | grep '/' | cut -d'/' -f1")
set tc to (count dtF)
repeat with i from 1 to tc
          set folderName to item i of dtF --<:  is the folder name, no need to use text item delimiters -->":"
          if folderName does not start with "2_" and folderName does not start with "Hot" and folderName does not start with "Press" and folderName does not start with "Design" then
                    set {oldTID, my text item delimiters} to {my text item delimiters, "_WK"}
                    set FolderEndName to last text item of folderName
                    set brandName to first text item of folderName
                    set my text item delimiters to "_PSD"
                    set weekNumber to first text item of FolderEndName
                    set my text item delimiters to oldTID
                    set theFolder to ("Hal 9000:Users:matthew:Desktop:" & folderName)
  --set up names to destination folders and create locally based on brand name and week number
                    set this_local_folder to "Hal 9000:Users:matthew:Pictures:2011-2012"
                    set localWeekFolder to my getFolderPath("WK" & weekNumber, this_local_folder)
                    set localBrandFolder to my getFolderPath(brandName, localWeekFolder)
                    set localBrandFolder_Low_Res to my getFolderPath(brandName & "_WK" & weekNumber & "_LR", localBrandFolder)
                    set localBrandFolder_High_Res to my getFolderPath(brandName & "_WK" & weekNumber & "_HR", localBrandFolder)
                    set localBrandFolder_PSD to my getFolderPath(brandName & "_WK" & weekNumber & "_PSD", localBrandFolder)
                    set this_Network_folder to "DCKGEN:Brands:Zoom:Brand - Zoom:Upload Photos:2012:"
                    set networkWeekFolder to my getFolderPath("Week" & weekNumber, this_Network_folder)
                    set networkBrandFolder_Low_Res to my getFolderPath(brandName & "_WK" & weekNumber & "_LR", networkWeekFolder)
                    set website_images to "DCKGEN:Website_Images:"
  --set up names to destination folders and create over Netwrok for FTP collection (based on a mounted drive)
                    set this_ftp_folder to "Impulse:"
                    set ftpWeekFolder to my getFolderPath("Week" & weekNumber, this_ftp_folder)
                    set ftpBrandFolder to my getFolderPath(brandName, ftpWeekFolder)
                    set ftpBrandFolder_Low_Res to my getFolderPath(brandName & "_WK" & weekNumber & "_LR", ftpBrandFolder)
                    set ftpBrandFolder_High_Res to my getFolderPath(brandName & "_WK" & weekNumber & "_HR", ftpBrandFolder)
  --taking the folder identify which process it must follow.
                    if brandName is equal to "Matt" then
                              try
                                        tell application "Finder" to set o's theseNames to (name of files of alias theFolder whose file type is in the type_list or name extension is in the extension_list)
                              on error
                                        set o's theseNames to {} -- no psd files or "8BPS"
                              end try
                              set numOfNames to (count o's theseNames)
                              repeat with j from 1 to numOfNames
                                        set thefile to theFolder & ":" & (item j of o's theseNames)
  --    M a t t    Folder Photoshop Process
                                        tell application "Adobe Photoshop CS6"
  -- I remove the command activate, Photoshop stay in background
                                                  try
  open (alias thefile) showing dialogs never
                                                            set myOptions to {class:JPEG save options, quality:12}
                                                            set myPSDOptions to {class:Photoshop save options, embed color profile:true, save layers:true}
                                                            tell current document
  --If the quick mask mode has been left on then delete the channel Quick Mask
                                                                      if (quick mask mode) then delete channel ¬
                                                                                "Quick Mask"
  --If the Layer is incorrectly labeled with Original Layer it needs renaming to original Image
                                                                      if (exists layer "Original Layer") then ¬
                                                                                tell layer "Original Layer" to set name to "Original Image"
  save in (localBrandFolder_PSD) as Photoshop format with options myPSDOptions without copying
                                                                      (delete layer "Original Image") flatten