How to serve .jnpl files on IIS 6.0

Hello.

I am trying to serve .jnpl files on an IIS 6.0 server. Could you tell me what configurations should I do?

I get this error message when I try to a access the web link that contains the .jnpl file.

HTTP Error 404 – File or directory not found.
Internet Information Services (IIS)

Thank you in advance.

Stergios