Hi,
I don't believe Limelight has a plugin for OSMF yet. They are not on
the plugin partner list:
http://opensourcemediaframework.com/partner.php.
I'm not familiar enough with that CDN to know if they have any
particular connection rituals you have to go through. I would suggest
downloading the base OSMF library/framework and try the URL in their
sample HelloWorld app, or get the Strobe player and try the URL with
that. If it works there, then it may be an issue in the config XML. If
it doesn't work there, then there may be some connection logic that
OSMF is missing for Limelight.
Sorry I can't be more helpful.
Nils