Hi Mike, you've got the old version there, you need the updated RingCircle2.htm file which is attached to this particular message here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=4441.11

You may have downloaded the one that Colin attached directly above that message - that one is the old version.

I'll also attach the updated one here, if you use this version you should be working ok in v3.

- Michael

Perfect! Thank you for your help.