Worked in Tiger but now.....

I need help figuring out what the syntax should be for this portion of Applescript that worked fine in Tiger, but does nothing in Leopard. This is part of a find and replace script that helps us remove garbage from emails that automatically flow into our Editorial system. The application is NewsEditPro IQue and we are on the latest version of Leopard. I am totally new to this, so be patient. Thank you.

tell application “NewsEditPro IQue”

tell story 1
	
	set (every text whose contents is equal to "	") to "¥¥"
	-- the "   " contains a \t to find tabs and convert to a nonsense character that will later be made a double-return.