Arduino serial port error ( special hello to the memberformerlyknownasawol ))

hi every one specially the memberformerlyknownasawol
my problem is i have recieve 1,1,1,1,1,* from serial port but when i want to send order like 0,0,1,0,1,* the program hangs
i have 5 keys and 5 leds
the keys worked perfectly but the leds that gets on with send order 0,0,0,0,0,* wont work
my friend make this and his leds works perfectly but mine are useless
so did u know what kind of problem may cuz that
i turn off firewall and anti virus
but i dont know what to do
plz help us

const int led1=5;
const int led2=6;
const int led3=7;
const int led4=8;
const int led5=9;
const int key1=A0;
const int key2=15;
const int key3=14;
const int key4=16;
const int key5=10;

String outputString = "";
String inputString = "";

void setup() {
  // put your setup code here, to run once:
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(key1,INPUT_PULLUP);
  pinMode(key2,INPUT_PULLUP);
  pinMode(key3,INPUT_PULLUP);
  pinMode(key4,INPUT_PULLUP);
  pinMode(key5,INPUT_PULLUP); 
  
outputString.reserve(10);
inputString.reserve(40);
    Serial.begin(9600);

    while (!Serial) {
    ; 
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  outputString.concat(digitalRead(key1));
  outputString.concat(",");
  outputString.concat(digitalRead(key2));
  outputString.concat(",");
  outputString.concat(digitalRead(key3));
  outputString.concat(",");
  outputString.concat(digitalRead(key4));
  outputString.concat(",");
  outputString.concat(digitalRead(key5));
  outputString.concat(",");
  outputString.concat('*');  
  
  Serial.println(outputString);
  outputString="";
  delay(500);

}

char temp;
char inputString_index=0;
void serialEvent() {
  while (Serial.available()) {
        char inChar = (char)Serial.read();
        inputString += inChar;
        inputString_index++;
        if(inChar=='*'){
            
            temp=inputString[inputString_index-3];
            if(temp=='1')   digitalWrite(led5,HIGH);
            else digitalWrite(led5,LOW);

            
            temp=inputString[inputString_index-5];
            if(temp=='1')   digitalWrite(led4,HIGH);
            else digitalWrite(led4,LOW);
            temp=inputString[inputString_index-7];

            if(temp=='1')   digitalWrite(led3,HIGH);
            else digitalWrite(led3,LOW);
            temp=inputString[inputString_index-9];

            if(temp=='1')   digitalWrite(led2,HIGH);
            else digitalWrite(led2,LOW);
            temp=inputString[inputString_index-11];

            if(temp=='1')   digitalWrite(led1,HIGH);
            else digitalWrite(led1,LOW);
        
         inputString_index=0;
         inputString="";
        }  
    }

  }

What is sending data to the Arduino? Which model Arduino?

HI , MY FRIENDs Arduino is a nano , but mine is arduino pro micro

pro micro