I am trying to fish a cable line down a wall. I have the hole drilled in my top plate from the attic, but when I try and fish the line down the wall I am being stopped about half way down the wall by a piece of wood. I am pretty sure it is a horizontal brace/spacer between my studs. I have one of those flexible fiberglass extension rods and I know it is wood of some type and it is stopping me about 1/2 way down. Does anybody have any ideas of what I can do?