Sharing Content during a VTC “Conference Call”

I am tryng to share content during a VTC Conference Session. I have a Polycom VSX7000s, two VSX 3000, one Visual Concert and a Notebook.
All three systems dial into a Call Manager to establish / join a Conference. Then from the Notebook / Visual Concert (connected to the VSX 7000s) we try to push a powerpoint slideshow out to all conference participants. I get the following error message:

“Destination Host Unable to Process Graphics” (FAR)

or

“Destination Host Unable to Process Media” (FAR)

This erro does not occur when the systems are connected using Point To Point.

Can the VSX 3000 receive content during a VTC “Conference” using a Visual Concert?

Does the content have to be pushed using “People+Content IP” Software?