Placing % Wilcards To QueryString For Query Parameter

I am working on a form that when text is entered, the action Page is to execute the following query: 

SELECT PhList.Name AS Employee, PhList.Phone, Department.Name, PhList.JobTitle FROM PhList INNER JOIN Department ON PhList.Department = Department.ID WHERE (PhList.Name LIKE @Search) OR (PhList.Phone LIKE @Search) OR (Department.Name LIKE @Search)"

 BUT... i am having trouble making my @Search Parameter = %value%  (where only 'value' was typed into the original form)

Here is my SQLDataSourceCode...<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Intranet %>"
SelectCommand="SELECT PhList.Name AS Employee, PhList.Phone, Department.Name, PhList.JobTitle FROM PhList INNER JOIN Department ON PhList.Department = Department.ID WHERE (PhList.Name LIKE @Search) OR (PhList.Phone LIKE @Search) OR (Department.Name LIKE @Search)"
OnSelecting="SqlDataSource1_Selecting">
<SelectParameters>
<asp:QueryStringParameter Name="Search" QueryStringField="Search" Type="String" />
</SelectParameters>
</asp:SqlDataSource>

 here is my Selecting code...    Protected Sub SqlDataSource1_Selecting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceSelectingEventArgs)
        e.Command.Parameters("Search").Value = "%" & Request.QueryString("Search") & "%"
    End Sub

 The error i am getting is...

An SqlParameter with ParameterName 'Search' is not contained by this SqlParameterCollection.  (From the e.command.par.........)