By the way...a cool method for patching drywall, sheetrock, plasterboard or whatever you want to call it:

This method is especially useful if there is nothing behind the patch to attach the patch to.

Square up the hole your are trying to patch by trimming it with a utility knife.

Cut a patch piece exactly two inches larger than the hole in all directions.

On one side of the patch, score through the paper and some of the drywall exactly two inches from the edge on all sides.

Break the drywall cleanly along your score lines.

Gently peel 2 inch edge pieces from the paper on the opposite side.

You should now be left with a patch piece the size of your hole and two inches of paper on one side extending in all directions.

Place the patch in the hole and mud it in, using the two inches of paper on the edges as if it were tape on a seam.

A couple of coats of mud and some sanding and painting and you'll never know it was there.