I have a Dell computer running Windows Sp3. It is just a generic work computer. I added an ATI Radeon HD 4350 so I could get a second monitor. My primary monitor works fine in the graphics card so I have my second one plugged into the onboard. . When I do the desktop properties to set it up, it doesn't work. I have checked the second monitor and it works. I have gone into the bios to make sure that it doesn't turn one off. Any ideas?