Hi James,
What knots are you using?
What DIAMETER (either in mm or thousandths of an inch) are you using and with what size / type of flies?
Where are the breaks occuring? Is it in the main leader or is it knots that are popping?
From what I remember, knock the power out of your cast, wait until your back cast has fully extended and don't batter the forward cast. Also, the rod you were on when I saw you last was a bit of a stick, not ideal for fishing small flies and light tippets really.
Cheers
Ben