Data Table Issue in Montecarlo Simulation

Look at the file attached. I want to run a simple Mote Carlo simulation where it will generate 50 trials using Excel's Built in Data table functionality.
The issue is that every time data table just copy pastes values from first row. Any idea where I am going wrong?

Oh Well I figured out that I need to press F9 to recalculate once data table is ready. It is because in Excel 2010 the default value for calculation is to Calculate Automatically Except for Data table!!!