Photoshop CS Save GIF troubles

I am having difficulty with the PhotoShop CS scripting of saving a GIF image.
Does the export function not work either? The seems to work but there is no file being created at the destination.
Here is an example of the type of script I would like to use:

property W170X170 : "Macintosh HD3:Scripts:ImagesDone:170X170:" as alias

set this_file to choose file with prompt "Choose an image to Process"
set the newGIF_name to my add_extension(this_file, "gif")
tell application "Adobe Photoshop CS"
	activate
	set display dialogs to never
	with timeout of 180 seconds
		open this_file
	end timeout
	set docRef to the current document
	-- Convert the document to a document mode that supports saving as jpeg
	if (mode of docRef is not RGB) then
		change mode docRef to RGB
	end if
	if (bits per channel of docRef is sixteen) then
		set bits per channel of docRef to eight
	end if
	resize image current document width 170.0 as pixels height 170.0 as pixels
	try
		set GIF89aOptions to {class:GIF save options, dither:diffusion, dither amount:75, palette:local adaptive, colors in palette:100, forced colors:none, transparency:false, preserve exact colors:true, interlaced:false}
	on error error_message
		display dialog error_message
	end try
	with timeout of 300 seconds
		try
			save docRef in file newGIF_name of W170X170 as CompuServe GIF with options GIF89aOptions appending lowercase extension with copying
		on error error_message
			display dialog error_message
		end try
	end timeout
	close docRef without saving
end tell

on add_extension(this_file, new_extension)
	set this_info to the info for this_file
	set this_name to the name of this_info
	set this_extension to the name extension of this_info
	if this_extension is missing value then
		set the default_name to this_name
	else
		set the default_name to text 1 thru -((length of this_extension) + 2) of this_name
	end if
	return (the default_name & "." & the new_extension)
end add_extension

Brandon,

Try changing your property declaration to:
property W170X170 : “Macintosh HD3:Scripts:ImagesDone:170X170:” as string

and saving as:
save docRef in file (W170X170 & newGIF_name) as CompuServe GIF with options GIF89aOptions appending lowercase extension with copying

works for me!

AH…Thank you very much for the insight.

Brandon