Going from a Triple to a Double?

[Acotts]

So I just replaced my Ultegra Triple Crankset with an FSA K-Force Double Crankset and I just cant get my Shimano 105 front deraileur to work properly.

I thought that I would just be able to narrow the limits on the deraileur and it would function as a double, but that does not seem to working for me. Is this a compatibility issue? Do I need to get new Brifters and front deraileur when going from a triple to a double?

Or should it work, it was late, and I had drunk one too may beers and couldn't figure it out?