Looks like you're trying to simulate a common base circuit,
but then R1/C1 need to go to a positive supply, not ground.
But I have no clear idea what C1 is good for. It will decrease the collector impedance for higher frequencies, thus lowering gain.
Are you trying to change the frequency response? It would really help to know where you git that circuit from. Obviously you haven't made it up yourself, otherwise you'd know what C1 is good for.