Proteus oscilloscope errors
I have circled where you have an unconnected node. This isn't going to do anything. Where I have drawn a (very crude) arrow, because of the way you've done your scope probes, the AC power supply is shorted together. 

The unuconnected node will likely just mean your simulation will run, but you won'e get any reliable measurements. Shorting the power supply is going to cause an error and the simulation will not run.