I haven't been able to understand head or tail of what you did there, it could have been put in a much simpler way.
Either you have 2 DVI cable Monitors connected to the DVI outputs of the Card or then you have 2 D-SUB(VGA) capable monitor plugged into DVI to VGA Dongles/Adapter On the Card.
Then you reboot your rig so that it detects a flow of current to both the ports, just in case it's not being able to do it when the rig is on.
Let windows automatically detect the monitors, if it does, then use the Windows Desktop Manager to configure the resolutions and positions of the Displays.
You can either then Extend the Desktop or then Mirror/Clone it.
This is what the dongle or adapter looks like