Error while reading values from two differant Infrared receivers?

Hi i got a problem and i need help

i use Ken Shirriff's IRremote library

i want to read differant values from two differant ir receiver.
i can read one value but when connect second ir receiver and try to read 1 and 2 together, i cant see any result.

here is my code

/*

  • IRremote: IRrecvDemo - demonstrates receiving IR codes with IRrecv
  • An IR detector/demodulator must be connected to the input RECV_PIN.
  • Version 0.1 July, 2009
  • Copyright 2009 Ken Shirriff
  • http://arcfn.com
    */

#include <IRremote.h>

int F = 2;
int B = 3;

IRrecv irrecvF(F);
IRrecv irrecvB(B); // bunu yaz?nca cal??smiyor

decode_results resultsF;
decode_results resultsB;

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

void loop() {

if (irrecvF.decode(&resultsF)) {

Serial.print("F: ");
Serial.println(resultsF.value, DEC);
irrecvF.resume(); // Receive the next value
}

if (irrecvB.decode(&resultsB)) {

Serial.print("B: ");
Serial.println(resultsB.value, DEC);

irrecvB.resume(); // Receive the next value
}
}

what actually happens when you run this ?

is the "resume()" function causing the whole thing to wait indefinitely ?