After about 12 hours of messing with this, I did a Factory Reset on my Sony Blu Ray & managed to get it up & running.
The only annoyance left is that I have to sign into NF every time that I want to use it - PITA! Judging by the comments on the net, this is a very common situation for a lot of users.
WiFi generally seems very flaky & problematic to me. Even my AA didn't want to stream my net radio station the past 2 mornings without screwing around with it...