Having Issues with a Script Error Coding Text to speech wit growl , itunes

Question

okay so earlier it was working fine. then i made it longer and more efficient. the point is upon a track change it should say the title and artist and then a growl notification should come up. Now I get some errors when I load it.
cant get name of <<class PtRk>> of application "iTunes"
that comes up twice...waits a few seconds then pops up again...
heres my code:
+global LastTrack+
+global CurrentTrack+
+global CurrentArtist+
+global CurrentAlbum+
+global playen+
+--the script to run when app starts+
+on run+
+ tell application "iTunes"+
+ if player state is playing then --if a song is playing set all variabls for T2S+
+ set playen to 1+
+ set CurrentTrack to the name of current track+
+ set LastTrack to CurrentTrack+
+ set CurrentArtist to the artist of current track+
+ set CurrentAlbum to the album of current track+
+ say "Now Playing: " & CurrentTrack & " by " & CurrentArtist+
+ --Put Growl Code here when Ready+
+ end if+
+ end tell+
+ set CurrentTrack to " "+
+ set LastTrack to " "+
+ set CurrentArtist to " "+
+ tell application "GrowlHelperApp"+
+ if playen is 1 then+
+ notify with name CurrentTrack title CurrentTrack description "Now Playing: " & CurrentTrack & " by " & CurrentArtist & " From " & CurrentAlbum+
+ end if+
+ end tell+
+end run+
+--the script to check for track changes+
+on idle+
+ tell application "iTunes" --update tracks+
+ set CurrentTrack to name of current track+
+ set CurrentArtist to artist of current track+
+ end tell+
+ --check to see if tracks match+
+ if CurrentTrack is not LastTrack then+
+ set LastTrack to CurrentTrack+
+ say "Now Playing: " & CurrentTrack & " by " & CurrentArtist+
+ tell application "GrowlHelperApp"+
+ if playen is 1 then+
+ notify with name CurrentTrack title CurrentTrack description "Now Playing: " & CurrentTrack & " by " & CurrentArtist & " From " & CurrentAlbum+
+ end if+
+ end tell+
+ end if+
+ return 1+
+end idle+
+--the code to run when the app closes+
+on quit+
+ tell application "iTunes" --closes iTunes when app is closed+
+ quit+
+ end tell+
+ tell application --makes sure this app closes too+
+ quit+
+ end tell+
+end quit+

Answer 1

When you save your script as an application, uncheck the Startup Screen option.
Several of your variables only get set within an if statement - if the condition doesn't evaluate to true, the enclosed statements aren't executed and your variable doesn't get set. You should set all of your globals to some default value (or use a property), since the global declaration doesn't set anything. Also, the application name parameter of the GrowlHelperApp notify command is not optional.
In the future, try not to use whatever put in all those "+" - they make pasting the script into an editor a bit of a pain.