Capture, Preview and wmv playback using windowless vmr9 picture in picture - Ian

I have configured a vmr9 in windowless mode  with two inputs, one for
wmv playback and one for video capture preview using the smart Tee
filter The graph also writes captured video from a webcam with audio
to an ASF filewriter.

My goal is to playback the wmv file wjilst displaying the capture
preview within the playback area and at the same time capturing the
live video and audi to a asf file for later playback.

My Problem is that when I build the graph the wmv playback is very
slow. If I build the graph with 2 vmr9 renderers in windowed mode the
play back is fine.

Does anyone know if this is possible and if so please advise me on how
to go about it.

Ian