Romans 8:38
Who is dead?
Ummm, you do realize that the scripture you referenced has zero relevance to the point in question. That scripture is taking about how tightly Paul clings to his faith in Christ and that even death or the threat of death will not cause him to recant his faith and separate himself from Christ.
The point in question is the fact that Catholic teaching includes prayers to Mary which directly contradicts the oral teachings of Jesus as recorded in scripture. And yes Mary is dead, as in no longer living on this earth.