Hey chaps! I been away for couple days but only just had chance to get back to this sonar problem!
WOW I cant believe it!! I just tried John T's trick of setting the
MIDI Playback buffer to 500 and BINGO it worked!!!! Thanks John! you have made my year!!!!

and thanks to everybody else for trying to help me! All your comments were much appreciated!!
Cheers guys!
-Deano