Most people do not snap the line backwards hard enough. You basically need to cast backwards as hard as you do forward. The rod should stop at 12 o'clock on the back cast. Then you need to wait it out. If it takes a second for your line to "unfold" in front of you, you need to wait an equal time for it to do the same behind you.
So ... snap back to 12 o'clock ... wait for the line to unfold behind you ... snap the rod forward to about 3 o'clock.
There are a couple of good videos on youtube that teach you the basic casting form. If you hit the "home" button up top, then look for beginner fly fishing lessons, you'll find a lot of info on this site.
You could come to Deltona, and I'd be happy to help you by taking you out on the water for a day.
"Give advice when asked. Give praise when appropriate. Give discipline when needed. Give respect always."