get HEX code from IRrecvDemo(Arduino-IRremote)

hi every one
i want get HEX code from IRrecvDemo for my remote tv but i have problem in arduino IDE .i see this Warning ('IRrecv' does not name a type).Please guide me .tnx

code:
#include <IRremote.h>

int RECV_PIN = 11;

IRrecv irrecv(RECV_PIN);

decode_results results;

void setup()
{
Serial.begin(9600);
irrecv.enableIRIn(); // Start the receiver
}

void loop() {
if (irrecv.decode(&results)) {
Serial.println(results.value, HEX);
irrecv.resume(); // Receive the next value
}
delay(100);
}

Your code compiles for me. I'd make sure you installed the correct library in the correct place.