how can I insert 2 markers (with image) in different series and in points with equal values

HI!!

i´m using Microsoft ASP.NET CHART CONTROL:

http://weblogs.asp.net/scottgu/archive/2008/11/24/new-asp-net-charting-control-lt-asp-chart-runat-quot-server-quot-gt.aspx

how can I insert 2 markers (with image) in different series and in points with equal values. next to each other.

??

tnx..
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