I'm trying to run a RealPlayer-based application on a remote host from 
PuTTY in Windows. It's an application that will capture Real audio as 
it plays through RealPlayer so it needs to actually open the 
application to do it. I don't see a way for RealPlayer to run without 
X so I'm trying to set the $DISPLAY variable to open RealPlayer on my 
Linux host. There must be something wrong though because if I do:
     DISPLAY=hostname:0 realcap [arguments] [options] [URL] &
I get an error message about not being able to open the display.

What do I need to do in order for my command to open RealPlayer on the 
remote Linux box instead of trying to open it on my local Windows box?

TIA.

-- Ryan