Attaching external monitor

I am trying to attach an external monitor, Acer V223w to my MacBook that's running Windows XP. When I do this, the (internal) display on the MacBook flashes between the normal desktop and black endlessly.
Note that (immediately) previous to attaching this monitor, I had the MacBook attached to another monitor (Acer AL2423W) and it was working great. Possibly this has something to do with the problem: maybe there is some "remnant" driver or setting that is causing a problem and that I can get rid of somehow.
When I attach the monitor to the MacBook, in the device manager, 5 or so "Plug and Play Monitor"s appear. Also, nothing appears on the external monitor. I have tried deleting all the Plug and Play Monitors from the device manager, but that doesn't help. I have found no way to eliminating the endless flashing of the MacBook's display.
In any case, I very much want to use an external display, but plugging one in makes the MacBook unusable. Any advice is appreciated. Thank you.

if you want to use the DVI port on the Dell LCD, then you would need to get a Displayport to DVI passive adapter. Otherwise, use the plain vga to vga cable.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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if you want to use the DVI port on the Dell LCD, then you would need to get a Displayport to DVI passive adapter. Otherwise, use the plain vga to vga cable.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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Attaching external monitor

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