as you are applying upward pressure on the engine (slight, nothing too extreme), use a screw driver (large one) or pry bar to help the mounts off the pads; this is pretty common as they seem to bind a little when in the seated position. if you put too much upward pressure the engine will "pop" up and smash into your firewall (ask me how I know). Just a little pressure, then try and pry up on it until it begins to move, then add a little more pressure upward until it is where you want it.