how to populate gridview asp.net 3.5 with objectdatasource

[elka]

I 'm going to populate a gridview with data from stored procedure in SQL server.
I wrote a method which returns a dataset. than I added an object datasource with all parameters.
onbutton click I bind a gridview

 protected void button1_Click(object sender, EventArgs e)
        {
        gvLookup.DataBind();
        }

But nothing happened.

would you able to tell me what Im doing wrong?

<asp:ObjectDataSource ID="AccessDatabase" runat="server" 
            SelectMethod="SearchCheck" TypeName="Cashiering.AccessDatabase">
            <SelectParameters>
                <asp:ControlParameter ControlID="txtssn" Name="SSN" PropertyName="Text" 
                    Type="String" />
                <asp:ControlParameter ControlID="txtAmount" Name="nAmount" PropertyName="Text" 
                    Type="String" />
                <asp:ControlParameter ControlID="txtPlan" Name="sPlan" PropertyName="Text" 
                    Type="String" />
                <asp:Parameter DefaultValue="0" Name="nMarket" Type="String" />
                <asp:ControlParameter ControlID="txtParticipant" DefaultValue="" 
                    Name="sParticipant" PropertyName="Text" Type="String" />
                <asp:ControlParameter ControlID="txtNumber" Name="cNumber" PropertyName="Text" 
                    Type="String" />
                <asp:ControlParameter ControlID="txtSerNo" Name="sSerNo" PropertyName="Text" 
                    Type="String" />
                <asp:Parameter DefaultValue="0" Name="dStart" Type="String" />
                <asp:Parameter DefaultValue="0" Name="dEnd" Type="String" />
            </SelectParameters>
        </asp:ObjectDataSource>

[tlhintoq]

TIP: When you are writing your question, there is a button on the tool bar that wraps the [code] tags around your copy/pasted code. It helps a bunch. Its the button with a '#' on it. More on tags. They're cool. Check'em out.