multicast img location grayed out on ConsoleOne

[donasutton]

Greetings,

I'm attempting to do a multicast with ZfD7 using ConsoleOne..
When I select the server and then attempt to select the image the box to do so is blocked or grayed out... see enclosed screenshot.

Very simple request.. Can someone please tell me what to type in the box in order to get my multicast to work properly??
lets say the image is on \\server1\images\image.zmg
the location is cn=server1,ou=server,o=tree
the images are on a volume labeled images.. and right on the root of that volume..

Side question... why is this greyed out?

Thank you for any help you can provide.!!