Having trouble with if and while loops when generating code

This code asks for a score between 0-100. If the score is in between, it is added to the total and later used to calculate the average. The problem I am having is placing the if statement if the score is greater than 100, printing an illegal statement and asking the user to retype the number. When I put this if, in the while loop, I am getting an infinite number of illegal exceptions printed out. how do I fix this problem?

public class SentinalValuedControlledLoop {

  public static void main(String[] args) {
       int studentCount = 1;
       double total = 0.0;
       double average;
       int score;



        Scanner stdin = new Scanner(System.in);

        //title at top of output
        System.out.println("Sai Bharathula's Score Report");

        //read score for student
        System.out.printf("Enter a score (0 too 100, -1 to quit #%d:)", studentCount);
        score = stdin.nextInt();


        while(score !=-1) {
       //THIS IS THE IF STATEMENT I AM TALKING ABOUT THAT IS CAUSING ME TROUBLE 
      if(score >100){
                 System.out.println("Illegal Score Try Again");
                  }

                 if(score >0 && score <= 100) {
              System.out.printf ("Enter a score (0 too 100, -1 to quit #%d:)", studentCount);
          score = stdin.nextInt();         
          studentCount++;  

            }

        }



   average = total / studentCount;
    System.out.printf ("\nThe average score for %d students is %8.2f\n",
                          studentCount, average);   



}
}