Chart Line Disappears when date added

[Rob Sutton]

Hello,

I am trying to create a line chart with markers using Excel 2007 SP2.
There are three series on the one graph.
When I change the horizontal axis labels using 'Select Data Source' from generic numbers to a date range, the line disappears but the markers remain.

I've tried adjusting the line thickness and colour, but this doesn't change anything. Changing the size of the graph doesn't change anything.

Does anyone know what is going on and how to fix it?

Thanks,

Rob.

 

[Rob Sutton]

Nevermind.

I had accidentally doubled up my date range.

Thanks,

Rob.