Hi Jim - thanks for the quick reply.
That is the first thing I tried, and also cleaned Cache etc, no change. So I retraced my steps and checked the back. It seems when I re-cabled things, I ran a power cord right across the antenna on the internet card. I moved the antenna away from power cord and that seems to have done the trick.
EMI? anyway thanks for the help - I really like JRemote, use it all the time!