Ricky,
Welcome to the forum!
If there is "stuff" in those tanks and not a drop came out with the handles pulled, it sounds like the valves are not opening or there is some other blockage.
Is your RV brand new? It sounds like the inner pull-cable inside the sheath between the pull handle and the actual gate valve hase become becomes disconnected at the valve. I've heard of it happening but it's pretty rare.
Jim