I'm an Arab and i still don't get tan !?

I'm Lebanese and moist of us are tan. I am not pale, nor am i exactly white, but i'm not nearly as tan as i want to be. For the past 5 days, iv been laying out in strong sunlight for about 20-30 minutes, today, i laid out for 40 minutes ! all i do is get a little pink. I don't use any product on my skin either. WHAT IS WRONG WITH ME !!!!!??? And how do i get tanner, w/out using a tanning bed ?