Changing windows task bar position when in Coherence Mode

My system is MAC Version 10.8.5: Parallels Desktop 9 (Build 9.0.23062: Revision 920702 Thursday Sept 12 2013
Windows XP Pro Version 2002 Service Pack 3

I have just upgraded from Parallels Desktop 8 to the latest 9 and, on the whole, the upgrade was fairly successful. However in the previous Desktop 8 I had my Windows set so that when I was in Coherence Mode the Parallels Windows screen was about 80% of the MAC screen so that the Windows Task bar sat "Above" the Mac Dock. However in my new Desktop 9 version this same Windows Task Bar sits at the bottom the the screen and is almost hidden behind the Apple Dock.

I have tried changing the settings for the Windows screen and I can make the windows screen any size I like as long as I am not in Coherence mode but as soon as I go into Coherence mode, the Windows Task Bar jumps down behind the Apple Dock. How do I make the Parallels/Windows screen change so that it is about 80% of the Mac screen. Just to clarify again, when in Coherence mode the active program screen is indeed easily seen in mid screen but it is the Windows Task Bar that gets lost behind the Apple Dock. In my last Parallels Desktop 8, this Windows Task bar was set so that in Coherence mode it sat just "above" the Apple Dock. I just cannot find the appropriate menu that gives this adjustment!!

Any help would be most appreciated because it used to be just fine before this last upgrade.