Upgraded to SSDR 2.0 yesterday, and successfully registered, but was running an Apple Airport that was a bit flaky. Decided to upgrade to a LINKSYS AC5400, which has UPNP, and is the very latest technology. Now SSDR says it successfully registered, but both TCP and UDP say "FAIL". I have a feeling that I should UNREGISTER and then REREGISTER to solve this. Comments?