Was just about to test and remembered that some of our doors are open at the moment.... I'll try later or tomorrow morning. Family is still up and moving around.
Remember that the ELK will not ARM if some of the controlled zones are violated. By chance, do you have some zone violated? Like wireless window or door sensor? I suppose you would know if the keypad says "Ready to Arm", right?
I presume that 1234 is a token for the actual code? In other words, you're entering in a valid code, right? ELK will not arm if there is not a valid code. At least that is what I remember. Maybe I am wrong.