monitor question ...not what you think

[Soh]

I have 2 Dell 2001 monitors, and to make a long story short, I disabled the one on right, using "right click on the desktop" > properties and so on.

The problem is, when I did this, the option came up on the right screen, so now when I try to get it back, the option screen is on the right monitor (I think) and can't get there because it's disabled.

When I try to move the mouse to the right screen, it only go as far as the right edge of the left screen.

How can I put the option screen on the left monitor? Thanks.

Soh