How to change a block parameter using SimState?

Hello everybody.

I'm trying to simulate different types of faults in a Simulink electrical power system. Then, I'm using SimState to get the system steady-state and from this point I want to apply the faults and check the behavior.

Thus, I'm using the Three-Phase Fault block to apply the fault and I need to change the type of fault at this block after SimState is loaded but system consider that is an error. How can I fix it?