Fault in the bode plot and transfer function

Hi,

I wanted to draw the bode plot of the circuit below.

cf1 = 3pf, cf = 3pf, Rf = 50 Gohm

By using "Simulink-PS Converter" in "Provided signals: input only" I had got an error :

"=== Simulation (Elapsed: 0.559 sec) ===

Error:['rc_transferfunc2']: Not enough input derivatives were provided for one or more Simulink-PS Converter blocks for the solver chosen. Implicit solvers (ode23t, ode15s, and ode14x) typically require fewer input derivatives than explicit solvers, and local solvers never require any.

The following Simulink-PS Converter blocks have continuous inputs. To provide the derivatives required, you can either turn input filtering on or provide the input derivatives explicitly by selecting the corresponding options on the Input Handling tab:

...'rc_transferfunc2/Simulink-PS Converter' (1 required, 0 provided)

"

So I added the "input and first derivative" and connect the derivative of the signal to "Simulink-PS Converter" too. In this case I faced no errors. But the plot is not correct. There must be a coefficient in its numerator. when I calculate its transform function in matlab it is as below:

But it should be :

0.5s/(s+3.33)

Do you know what's the problem?