Dualview Display problem

[patti]

I am using windows xp
>-----Original Message-----
>I have a monitor attached to my laptop. When I first
>attached it I could view my desktop from both the laptop
>display and the monitor. My monitor was flickering so I
>went into the display properties and was messing around
>with the resolution. When I did this, I messed up the
>settings somehow and now my displays are setup as dual
>monitors. My attached monitor has my wallpaper with no
>task bar, icons, etc. My laptop monitor has the full
view
>of my desktop. If I want to use my attached monitor, I
>need to drag items from my laptop monitor. I want to put
>it back the way it was. I "think" what I need to do is
>set dualview display, which I am directed to uncheck
>the "Extend my windows desktop to this monitor". When I
>uncheck it, the attached monitor has no display.
Aaaaggh,
>what do I do now?
>.
>