Is the 3-Hose a modern hookah with flow-back valves ? If not, were the other two members of your session plugging their hoses while people were trying to draw ?
If yes to either of the above, check for leaks. Make sure the bowl grommet fits correctly, make sure the vase grommet fits correctly.
Did you have enough holes in the foil ? Too few holes will restrict airflow to the point of not being able to get any smoke, or on the flip side, did you have so many holes that the amount of incoming air dissipated the smoke before it got to you ?
Is there something in the stem ? Wash it out and make sure.
Last edited by HookahWaffle; February 26th, 2010 at 01:00 PM.