Proteus analogRead stuck at 1023

[di_g7]

Hello

So I have been working in Proteus software to program Arduino uno board to turn on LED 13 when the analogRead input of Potentiometer is between 500 and 1000.

But I have got this problem where the read of the input A0 is stuck at 1023.

I have updated the Arduino library to version (v4.0) from BLOGEMBARCADO.

After I have updated the the library it got stuck at 0.

I have even connected a voltmeter to see if voltage is going through.

note : I am new to the program so hopefully nothing is wrong with the code or with the layout.

void setup() 
{
  Serial.begin(9600);
  pinMode(13, OUTPUT);
  pinMode(A0, INPUT);
}

int v = 0;

void loop() 
{

  v = analogRead(A0);
  Serial.println(v);

  if (v >= 500){
    if (v <= 1000){
      digitalWrite(13, HIGH);
    }
    else {
      digitalWrite(13, LOW);
    }
  }
  else digitalWrite(13, LOW);

}

[di_g7]

And guess what .
I just fixed it by deleting the -5V on the power.
Before closing the project I said lets delete that number maybe it would make a difference, and now its fixed