Session Tag on aspx page

My attached column is bombing out because of the session in the navigate tag.

If I hard code it, works fine.  

I know I'm missing something simple here.
<telerik:GridHyperLinkColumn DataTextFormatString="Search CRM"
                        DataNavigateUrlFields="sourceNumber" UniqueName="sourceNumber" DataNavigateUrlFormatString="http://inboundcalls/default.aspx?ph={0}&u=<%=Session("userName")%>"
                        HeaderText="Search CRM" DataTextField="sourceNumber">
                    </telerik:GridHyperLinkColumn>

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Larry Bristersr. DeveloperAsked:
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Kyle AbrahamsSenior .Net DeveloperCommented:

Try this:

='<%# Session("userName") %>'


Pretty sure you want the databinding expression.

If not try

='http://inboundcalls/default.aspx?ph={0}&u=<%= Session("userName")% >'
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