Dual monitor question

Tough to find info on this subject in searches throughout the various forums. I just discovered that my cheap ATI graphics card has two ports on the back and I have this old Packard Bell 15 inch monitor so I went out and bought the adapter to let me hook it up. I'm running a pretty beefed up system - (AMD 64 3200, 1Mg of memory and my FS system on a SATA hard drive) so I normally get very good response from FS9. However, when moving an undocked second window to the second monitor, polygons from the autogen scenery below simply wack out. Now, were I really stoned, these giant distorted buildings growing like crystals off the landscape might be pretty cool but those old hippy days are long behind me. This only seems to occur when flying over areas with autogen buildings so that seems to be the last straw that pushes my system over the edge. Anyone have similar problems and did you find a solution? That little glimpse of the possibilities of the extremely widened view was tantalizing but flying without autogen doesn't seem appealing.Thanks,Art Martin Sorry for people that already read this in the FS general discussion hardware area but it doesn't seem to be getting anything other than looks in there.