jagged type gifs

hello!
i've got some type that i'm saving as a transparent gif, using PS7's "save for web" option. when saved with a transparent bkg, and posted to a web page, it looks like CRAP!! but, when i take the exact same text, and save it with a background, it looks fine. i used to remember how to fix that.. but apperently i've forgotten. so.. how do i get the text to look nice and crisp when saved with a transparent background???

In the Save For Web dialog, go to the far right and set the Matt color to that of the background color of the page the image will be placed on.