Bought new computer, having graphic issues

[jeffand3js]

I just bought a new computer and am trying to get hoster to run correctly. Problem I'm having is everything seems to be working fine except when I hit play, the extended screen goes blank. Nothing is showing up. When I first opened it yesterday, the graphics were showing up but they were too big. So I started messing around with everything and somewhere I screwed up. My background is showing up fine. Here are the computer specs:

OS Name Microsoft Windows 7 Home Premium
Version 6.1.7600 Build 7600
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name JEFFAND3JS-PC
System Manufacturer HP-Pavilion
System Model AZ224AV-ABA 300-1100z
System Type x64-based PC
Processor AMD Athlon(tm) II X4 600e Processor, 2200 Mhz, 4 Core(s), 4 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. 5.09, 1/19/2010
SMBIOS Version 2.6
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "6.1.7600.16385"
User Name jeffand3js-PC\jeffand3js
Time Zone Eastern Daylight Time
Installed Physical Memory (RAM) 4.00 GB
Total Physical Memory 3.75 GB
Available Physical Memory 2.41 GB
Total Virtual Memory 7.50 GB
Available Virtual Memory 5.85 GB
Page File Space 3.75 GB
Page File C:\pagefile.sys

Any suggestions would be greatly appreciated. I've updated all the drivers on the graphics card. It's something I've done and can't figure it out. Please help. Thanks in advance.

[ddouglass]

Set the resolution on the second monitor to either 800x600 or 1024x768.

[jeffand3js]

it's set at 1280 x 1024. won't allow me to change it. tried advanced settings to change it.

[ddouglass]

First did you do the following items for Windows 7 at this link?
http://www.mtu.com/upgrades/hoster/windows7-changes.htm

If these are not done you may be prevented by Windows 7 from making some changes.