Why has my stovetop moka coffee maker suddenly stopped working?

Everything seems to work fine except the water is not coming up to brew the coffee. Plenty of steam. Cleaned/cleared the screen, the water pipe part, everything looks fine. Worked one day and just didn’t the next. Any ideas?

About how much coffee should I use in the Bialetti Moka Express 6-cup coffee maker to make 6 cups of espresso?

This is a stove-top coffee maker, and I’m just looking for the correct coffee-to-water ratio. Any manufacturer will do, I suppose.

My New Krups Moka Brew Coffee Maker

Image taken on 2007-05-23 15:02:33 by vanderwal.