emboss and then .gif: crappy image

Hi,

I'm trying to create some icons using layer style/blending options.

I do emboss and apply gradient and add glow and so on.

Looks all really nice. But then, when I save for web and devices as a .gif file, there is some ugly "blur" around my created shape. As if .gif. interpreted the embossing thing in a wrong way,giving it some color instead of transparency ...

if you wanna see what I mean, check out the black and red bubble on:

http://www.awaycity.com/forum/

anyone can help? how do I avoid that effect?

ok,problem solved! actually, you find those shapes all ready to use when you select the custom shape tool