Need more information.

In general, create your chart using a chart type that represents some of the
series in your ultimate chart. One by one as needed, select a series, and
change its chart type (right click and choose Chart Type or Change Chart
Type). Then one by one as needed, select a series and assign it to the
secondary axis (right click, Format Series, Axis tab or in 2007 the first
tab you see).

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
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"Emmanuel" wrote in message
...
how do i set combination chart with two columns