Do you really want the large capacitor to be 2600 Farads?
It appears that the switch is too ideal. You probably need some resistance between the voltage source and the capacitor, in series with the first switch.
If you don't get the help you need here, you might get better results in the RF & Analog group, or else create a service request through SupportNet.
I do not know how to define the parameters of switchs like
RON On resistance W 1.0
ROFF Off resistance W 1.0/GMIN
VT Threshold voltage (SW only) V 0.0
VH Hysteresis voltage (SW only) V 0.0
IT Threshold current (CSW only) A 0.0
IH Hysteresis current (CSW only) A 0.0