Install multiple display on Dell GX620

Hello,
I have a Dell GX620 workstation here with Intel 82945G Express Family Chipset. The screen I have has a port for another monitor so I hooked up my old Dell screen(i.e. E173FPf) and booted up the PC. Now throughout when the PC is working my second display shows a Self Test Feature Check and when I go to the Display Properties (Settings Tab) it shows my second display as disabled and when I enable it and choose the" Extend my Windows desktop onto this monitor" option and click apply we come to square 1 where it is disabled. I even try making it my primary deisplay but nothing to it. In the Device Manager, there are 3 Plug and Play Monitors, 2 display adapters and 2 processors. Pleas help!