With some of these newer bikes, I have heard that you need to open up the master before pushing the piston in. If you did not do that, you may have damaged the master piston seal. You brake would not leak, it jsut would not move fluid.
Pulll the caliper off and remove the pads and pull the lever, if no movement, open the master and see if fluid is being moved. If not, then I bet it is that seal.