Won't save the preset rating

[mnx4]

So I've been going through the presets, changing the ratings for a ton of the presets. However, after going through about 100 or so, I realized that the ratings changes did not stick. I hit +/- to change the rating, then hit either h or space bar to go to the next preset, but then if I hit backspace, the previous rating would show up.

I've got vista 64bit home premium, and I'd venture to say that the preset rating file can't be saved to or something stupid like that. Any ideas?