Thanks for the tips. I looked at the file and found the compatibility problem and solved this by getting the latest update which installs the coyotewavetableDXi. Yes i should have done this earlier i know.
However this has not solved everything. The midi data now renders to wave (successfully, or so it says) but when i play the song in the new wave format (win. media player or nero) only the first 8 bars play and then nothing.

Culfy