Back cast?

[iliketofish]

So, I realize that without seing somebody cast it is hard to give advice, but I'll throw this out there anyway. I've been seriously fly fishing for a couple of years now, and I'm ok at it. I practice all the time in my yard when I can't actually go fish, and I've noticed that my forward cast looks pretty good, but when I make my back cast it frequently just dies and doesn't unroll like it should especially when I'm trying to make long casts. has anyone had any similar experience and if so how did you fix it?
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