If there are only 1 seeds, then you are most likely in a Que. How many users are downloading? If there is like more than 5 people and only 1 seed, then it's likely that the person seeding has his upload bandwidth maxed (if he hasn't like a T connection or an excellent contention ratio with their ISP), and the max amount of users at any one time has been reached.

Leave the torrent file going regardlessly, and it will probably start up eventually. Most likely when a couple of people downloading have finished, and there is a slot free with you next in line for the slot.