Hey thats quiet funny, You want the button 2 to perform other function other than the function performed by button, and ur not sure what function you want to perform i guess?, because you have even labeled the caption of your button 2 same as button 1 ie "ADD". and want to perform another function.
That has to do nothing with the caption, i know that, but first make final what function the button needs to perform then code the statements and then finally give a Condition, which you have given, with not the caption of the buttons but the variables assigned for the buttons. This might work.
HAPPY PROGRAMMING !!!