Secondary "Y" axis in chart, within Microsoft Power Point 2003

[got caught]

I'm trying to place a bar chart in "Microsoft Powerpoint".

I'm trying to demonstrate the activity of my colleagues, (which ranges from 500 to 1200 episodes). I'm then trying to demonstrate the number of times the colleagues refer to a secondary agency. (Ranges from 0 - 12)

I need a secondary y-axis to demonstrate this, but, despite following the online "help " menu, I'm unable to generate one. I'm highlighting the data set, and selecting the "format" drop down menu, but the desired selection is unavailable.

Any idea's , thanks .