Voltage controlled switch always closed in simulation
Put a 1k resistor across the control terminals of S1.

Now see if you can figure out why this makes a difference.



A voltage-controlled switch is just that &mdash; sensitive to voltage only. It doesn't care whether that voltage is connected through a 10M resistor or a 1m resistor &mdash; since it draws no current, there's no voltage drop across the contacts of S2 in either state.