HCPC Linked To Plasma

I have recently built a top spec HCPC consisting of the components in my signature. All is running like a dream with all drivers fully up to date. I have just connected it to my Panasonic Plasma using the second DVI-D output from my Graphics card and a DVI-D - HDMI lead. The two displays have been found ok and the software adjusted according , the problem is that all that is displayed on my Plasma (Hdmi 2) is the desktop picture I have on monitor one (the Hewlett Packard). No desktop icon are displayed nor any pictures / movies etc. It just sees the picture I use as desktop background.