How do I slice an Adobe Illustrator Image to use for the web?

I recently created a webdesign template using Adobe Illustrator, and saved it for the web and devices. Now I want to slice the image so that I can add it to Adobe Dreamweaver for use on the web. What would be the best option for me to slice the image up?How do I slice an Adobe Illustrator Image to use for the web?
If, in Adobe Illustrator, you go to Save For Web (under File) you see a slice Icon...you're supposed to be able to just click or drag on the image and it'll slice. BUT that doesn't work for me--not sure why, maybe somebody else will post a better response. I found I could go to Image Ready (which you probably have if you've installed Photoshop) and the Slice Icon there works perfectly.