GIMP :: Stroke Path Tool Not Working?

Simply press 'b' for the bezier select tool, and click where you want a line to begin, and click again where you want the line to end. Now, you can move the line around until you get it perfect by clicking on the dot on either end and dragging it with the mouse. Isn't that neat! You can even click on the middle of the line and bend it! Try it! You can draw any shape with it.

If you make a mess, just press ctrl + z and undo your last changes. The GIMP remembers a very long list of changes, so you can go backwards step by step.

When you are happy with your line, or lines. just click 'Edit' --> 'Stroke path'. A box will open to allow you top choose settings for exactly how you want your line stroked. You can just leave it the way it is, or you can make GIMP do almost anything with your line. GIMP will remember your previous settings too, and offer you the same settings for the next line. When the box mentioned above pops up, I choose my desired settings and hit the "Stroke" button, absolutely nothing happens. No matter how thick I tell it to make the line, no line ever appears.