Problem Printing Excel Graph -data doesn't show up when printed
 

My graph looks fine on the screen.
When I go to print everything shows up but the graph bars (the actual data).
I have tried this from two different printers - it produces a blank chart.
The labels and axis and titles all appear fine, just no data.
I tried making it a line chart it does the same thing.
This is in Excel 2003.
This problem persists if the chart is embedded in a worksheet, on it's own
page, or exported to powerpoint.
Actually from powerpoint the grid lines don't show up- but all the axis
labels and title still do.
Thanks for any help