How do I get my soundstage back?

I seem to have lost my stage and am struggling to get it back, here's the story.
* My setup is set in a bay window with the speakers @ 7ft apart, the back outer edge of each box in about 8" from side/rear wall & inner edges at 15" these side walls taper back to the flat rear window wall of the Bay. In my old setup there was a 20" TV on a stand and a stereo cabnet 42" tall and 22" square. I had a nice high, wide and resonably deep stage. The stage reached pretty much to the the 8 foot high ceiling.
* Changes in setup:
The system is still in the bay but now there is a nice new 50" Pioneer Elite plasma in the middle on a stand that is 6ft long, 22" deep and 19" high the screen on the stand now is 51" high and 56" wide in total and all gear is now in or on this stand with the TV. The soundstage is now flat, no depth and sound has dropped to about 2-3 feet off the floor. To me the speakers are now much more visable you might say in the past they pretty much disapeared. I have played some with speaker placement but so far not having any luck, I even tried throwing a blanket over the TV to see if that would help but no luck.

What do you suggest I do or try to get back to square one?

Gear:
Speakers - Paradigm Reference Studio 60V2's
Sub - Paradigm Servo 15v1
Power amps - Odyssey Audio Mono Extreme SE's
Preamps - S.F. Line2 SE+
CDP - Cary CD308 (solid state)
SACD/CDP - Sony SCD333ES

Thank for your help.