Cutting Sections Out of an Image Using A Vector Selection

[Eugbug]

I want to cut out a section of an image and drop it onto a white background in another image.
I drew a vector point to point line around the area I wanted to copy and chose "selection from vector object" thinking that this would select the region inside the vector object. I then tried "copy merged" from the menu and pasted the clipboard into the new image. Now this didn't work and the copy only seems to copy the what is under the selection line rather than what is enclosed.
Does anyone know how I go about doing this properly?

[LeviFiction]

Vector selections select the area filled in by the vector. So if you only have a stroke it'll only select the stroke. You need to make sure the vector has a fill as well.

[Eugbug]

Vector selections select the area filled in by the vector. So if you only have a stroke it'll only select the stroke. You need to make sure the vector has a fill as well.

Thanks for the answer!
I set the stroke style to none and picked a fill color. It doesn't seem to matter what the color is. After converting the vector object to a selection, I switched to the background layer and copied the selection and this pasted ok into the new image.