Minecraft Tinkers Construct mod not working?

Ok so i installed the mod correctly because i can use it in the game. When i set up a smeltery (which i have set up correctly because i have done this before and it worked) and put ores in it to smelt i can't drain them out. I click the faucet which usually works but nothing happens. It worked fine before but now it doesn't. Please help.

Added (1). Kevin thanks for the reply. After re-installing it, it still doesn't work.

You'll need to reinstall it. There's likely a bug in the mod.