Mini Golf 9th hole

Does anyone know how to get a hole in one at the last hole (9th) on funkypool mini-golf?
I've had holes in one on the first 8 holes loads of times. but can't get an ace on the last.

if you look at the rankings...minigolf you can see all the people who have scored 9

http://www.funkypool.com/thread/15617/last-level-on-mini-golf

Everything you will need to help you is there..

Thanks a lot keoghz