Does anybody know how to beat the 2nd Level in Phantom Menace's demo quest?

I've beaten level 1 and level 3 and I feel like I've tried EVERYTHING to get through level 2, or to proceed through more of the game.

I got the bait which I needed for level 3, but I can't find how to get to the boss's room.

Any help would be much appreciated!

-Mapes