You did release both the mainsheet and jib sheet, right? With 400 lbs. you two should be able to right just about anything, if you are doing it correctly. Make sure the mast tip is upwind, not downwind. About 45 degrees off dead straight upwind, so the wind can get under the mast and help lift it. How do you do this? Simple, you sit on the low bow and wait for the wind to blow the boat around so the mast is upwind, not downwind. And be ready to jump onto the low hull (to hold it down) as the mast comes up and over, as it may just blow right over again.

I think if you search You Tube, you might see a video of someone doing it correctly.