Image button click event

I am using a Image Button

<asp:ImageButton ID ="SubmitACH" runat="server" ImageUrl="~/images/buttons/selectACHTransfer.gif"
                    AlternateText="Select ACH Transfer" CssClass="goalCloseButtons" OnClick="SubmitACH_Click" />
 
on its On click event I'm writing this code
protected void SubmitACH_Click(object sender, EventArgs e)
        {
            Response.Redirect("abc.aspx");
        }
 
And I am getting an error 
'Page.aspx' does not contain a definition for 'SubmitACH_Click'
 
Any help
 
Thanks alot!


 

 
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