I'm not sure, but maybe it needs dividing? Mine is doing the same thing and I think that is the problem.
I hope someone can help...Marylee

You should go to the houseplant forum for more information. Usually, when the water is going straight through it means it is root bound. There is no viable soil in the pot. You'll need to repot it into a slightly larger pot. When you do this take a sharp knife and cut the roots to start new feeder roots. This would be a good time to divide your plant. You will be able to see the divisions when you get it out of the pot and the roots somewhat untangled. I hope this helps.