How to reset Gridview Sort

<asp:GridViewid="gridview"

runat="server" DataSourceID = "SqlDataSource1"

       PageSize="30"  EmptyDataText = "No Records Found" EmptyDataRowStyle-HorizontalAlign ="Center"

               AllowPaging="true"    

    HorizontalAlign="Center" BorderColor ="Black"   Width = "762" Font-Names="Calibri"

  AllowSorting = "true"  Visible= "false"  >

<asp:SqlDataSource ID="SqlDataSource1" runat="server" 

   ConnectionString="<%$ appSettings:connString  %>"         

   SelectCommandType ="StoredProcedure"  SelectCommand = "All_Records" >

First time on page load 

Sorting works fine 

But if I done sorting on gridview column then its always the same , How to assign result of SQL query to my result 

so that my sort will show result from sql query order  not the order of grisview sort 

Please help me