Sim900 Gprs Shield Arduino Uno Power On error

Good day.

I have bought Gprs shield Arduino Uno. It's work fine. But software power on doesn't work.
First, I connected 9 pin arduiono with 9 pin gprs shield and run next code

void powerUp()
{
 pinMode(9, OUTPUT); 
 digitalWrite(9,LOW);
 delay(1000);
 digitalWrite(9,HIGH);
 delay(2000);
 digitalWrite(9,LOW);
 delay(3000);
}

But nothing happens. Then I found information that JP should be solder. But I can't find JP.
Can anybody help me?

I have found decision. R13 should be solder.

cool! thanks that worked.