Zacary called this one, I'm afraid. The funniest thing about it is I went looking for a picture to compare your board to on the subwoofer replacement guide and it looks to me like they did the exact same thing you did; knocked the board connector off when trying to disconnect the cable.
[image|3093541]
Anyway, the good news is it looks to me like the pads on the board are intact so in theory a touch with the soldering iron will hopefully be all it takes to get you back in business.