🚀 go-pugleaf

I'm trying to use the tabbing environment in LaTeX to produce some part
of a document written in spanish. Somehow, the accents don't work
properly! Out of a tabbing environment, I'm using:
	
		\'{letter}  for letter = a,e,o,u
		\'{\i}      

and everything works fine!
My LaTeX reference manual says that, to get the accents, you have to 
rewrite \'{letter} to \letter'. I did this but I'm not getting the 
same results! Any suggestions? Thanks a lot!!
			-Arturo.
P.S. Please, e-mail I'm not a usual reader of this newsgroup. Thanks!!