Applescript add track to playlist

Question

I have two variables track_name and selectedpl
selectedpl is defined with
set selectedpl to {choose from list x with prompt "Please select the playlist you want to save this song." with title "Playlist Selector"}
And I'm trying to do this command
duplicate track track_name to playlist selectedpl
I tried "quoted form of", "a reference to", " "'" & selectedpl & "'" " but no luck.
Thanks in advance
Best Regards

Answer 1

Okey this is my code
>>>>>>>>>>>>>>>>>>>>>>
set userApproved to true
try
          set addPlaylist to display dialog ¬
                    "Do you want to add this track to playlist now ?" buttons {"No", "Yes"} ¬
  default button "Yes" cancel button ¬
                    "No"
on error number -128
          set userApproved to false
end try
if userApproved is true then
          set newPlaylist to true
          try
                    set newPlaylistMaker to display dialog ¬
                              "Do you want to make a new playlist and save your track in that playlist ?" buttons {"No", "Yes"} ¬
  default button "Yes" cancel button ¬
                              "No"
          on error
                    set newPlaylist to false
          end try
end if
if newPlaylist is true then
          try
                    set playlistName to display dialog ¬
                              "What is your new playlist name ?" buttons {"OK"} ¬
  default button ¬
                              "OK" default answer ""
          end try
          set new_playlist_name to text returned of playlistName
          tell application "iTunes"
  make new user playlist with properties {name:new_playlist_name}
          end tell
          set selectedpl to new_playlist_name as text
else
          tell application "iTunes"
                    try
                              set x to get name of playlists
                    on error
                              display alert ("Can't get playlists from iTunes.")
                              error number -128
                    end try
                    set itemsToDelete to {"Arşiv", "Müzikler", "Filmler", "TV Şovları", "iTunes U", "Kitaplar", "Purchased"}
                    set prevTIDs to AppleScript's text item delimiters
                    set AppleScript's text item delimiters to "TRICK"
                    set x to "TRICK" & x & "TRICK"
                    repeat with i in itemsToDelete
                              set AppleScript's text item delimiters to "TRICK" & i & "TRICK"
                              set x to x's text items
                              set AppleScript's text item delimiters to "TRICK"
                              set x to x as text
                    end repeat
                    set AppleScript's text item delimiters to "TRICK"
                    set x to (x's text 6 thru -6)'s text items
                    set AppleScript's text item delimiters to prevTIDs
                    set selectedpl to {choose from list x with prompt "Please select the playlist you want to save this song." with title "Playlist Selector"}
          end tell
end if
tell application "iTunes"
  duplicate track_name to user playlist selectedpl
end tell
<<<<<<<<<<<<<<<<<<<<<<<
track_name is defined before with another script
The result I want to get is:
track_name is set -- No problem track_name is "Cobrastyle"
selectedpl is set -- Playlist is selected no problem selectedpl is "test"
add track_name to selectedpl -- Problem selectedpl needs to be contain track_name
Thanks in advance