Tailing loops - the prime cause of windknots, are cause by stopping the rod too abruptly on the forward and back power strokes - particularly the back stroke. They are also caused by the caster going "out of plane".
The easiest way to eliminate a tailing loop is the consider your back cast first and foremost. Because we are built the way we are, the backcast is the most difficultcasting stroke to execute. Casting forward is easy but if our backcast is faulty, the forward stroke will compound all those faults.
It the end of the backflick there must be an almost inperceptable pause and drift before the foward "power flick".
There used to be a rather silly way of teaching people to cast which involved putting a rolled up newspaper under your elbow, and at the same time telling the caster that he or she must keep the wrist stiff. The legacy of this kind of nonsense is thousands of poor casters who constantly struggle.
I would, as Adrian says, strongly recommend that you have a couple of lessons with a professional. It is most difficult in words to describe the mechanics of fly casting. If there is any other advice I can give it would be for you to slow down a little and try putting smoothness into your casting. Do notkeep trying to cast a long way. Keep your false casts down to a minimum.
The fact that you lost a big trout is evidence that you are doing some things correctly. Don't get too upset, get that casting right and you will be soon on the way to catching lots of fish and having a lot of fun.
Oh and eliminate that caps lock and bold. IT SOUNDS LIKE YOU ARE SHOUTING!
