Upnp on Airport Extreme

[Haakon]

I'm sorry for kinda reposting, but had no luck on previous post and was hoping
a reentry on the issue might result in some help. Again sorry.

I have a problem accessing my stora remotely.
I have the Stora connected to the internet through an Airport Extreme (latest n- version)
The stora agent is not able to see the Stora unit (preferences -> advanced)
Nor, am I able to log in to the stora through mystora.com
However, I am able to access it through explorer.
I'm suspecting that there are some "uPnP" settings to be made on the Extreme, but have not been able to find out how and what. I'm not sure,
but think NAT and port-access services (Ftp-access, maybe?) might be relevant to look at.. However, it's beyond my knowledge.
Is there a simple, straightforward guide on how to properly set up the airport to allow the stora agent to see my unit and also allow me to access the stora remotely?

I'm running Windows7 and has recently replaced my previous Linksys wireless router with this new airport extreme.

Please advice