par play of same realpix file in multiple regions

authoring using SMIL 2.0, I am trying to play the same realpix file in 
3 different regions simultaniously, without calling the realpix file 3 
times from the server (save bandwidth...) by using the regionName 
attribute.

There seems to be no problem doing that with a static image file and/or 
with a playback video file, but when a realpix (.rp extension) file is 
specified as the source, realplayer only displays the first region 
defined in its layout.

This option is described in the real production guide, but I did not 
see any notes warning against doing that with a realpix file as the 
source (chapter 12, layout).

In the -layout- area all three regions have unique ID's but an 
identical regionName

In the -body- area I only specify, once, the regionName as defined 
earlier and the source for the media.
Does not work with rp for some reason, any ideas?
Thank you