Thanks Daniel,

I've tried a different room (even took my remotes to work [SAD]) but that dosen't solve it since the TC really dosen't want to learn from the Sony remote, BUT...

After reading some pronto forum comments, I looked out my old Denon learning remote, and this manages to learn the sound fileds OK. Teaching the TC from the Denon works about 30% of the time, so I've actually got about 5 of the 30 odd sound fields working from the TC now. So I guess when I get home tonight I'll be bashing through the rest until I get 100%... Wish me luck !

I'll post complete instructions and my irm file for all DA50ES owners once it's complete...