dual screen set up difficulty

Hello,

I am running 13.1, XFCE and having difficulty setting up dual monitors.

Here are the hardware details:
CPU: AMD Athlon X4 760K 3.8GHz Quad-Core Processor
Motherboard: Gigabyte GA-F2A55M-HD2 Micro ATX FM2 Motherboard
Video Card: XFX Radeon HD 6670 1GB Video Card
Display1: HP W2271d 21.5-Inch Screen LED-Lit Monitor
Display2: Hannspree HF205DPB 20-inch Widescreen LCD Monitor

Display 2 is not found or listed in the hardware profile and therefore I am unable to setup. I am running the proprietary driver fro the video card. Can someone recommend a trouble shooting starting point? Yes I have switched them around and can use each monitor by itself. I have checked power and checked connection.

Due to lack of 2 vga connections on the video card I am forced to convert one of the screens to DVI-D from a VGA cord.

Thanks,

jg