I'm trying something really basic : a RC-circuit with a direct source. Here is a capture of it.

I know the voltage at the capacitor terminals is C1(t) = V1(1-exp(-t/RC)), so I should see the tension inscreasing to u(0)=0V to reach u(t) = V1.

But why the analogue analysis doesn't show that? RC = 1000*1*10^(-6) = 1ms.

I'm using Proteus 8 Professionnal.