Quatum entanglement and FTL

I don't entirely get the causality thing myself.

If you live fifteen light years away from me, and I pic up the mike to
my FTL radio and say "Hi," and you here that one year after I say it,
where is the violation causality? Sure you heard it before a regular
radio signal or laser carrying the same message would have gotten to
you, but so what? It would only be a violation of causality if you
heard it before I said it.

OK, apparently I'm wrong about this, but I just don't get it.