ASP.net Membership,Return url and Redirect page

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C#

I am using Login control in ASPnet membership
I added a link in this control (ex: forget password), want user to redirect to next page(eg:Forgetpassword.aspx)

<asp:Login ID="Login1" runat="server"  EnableViewState="true"
         OnLoggedIn="Login1_LoggedIn"   >

<asp:LinkButton ID ="ForgotPassword" runat="server"
                                            onclick="ForgotPassword_Click" >Forgot password</asp:LinkButton>

on using Membership I have a returnurl problem in login page
so i used in global.asax
//my code goes here

void Application_BeginRequest(object sender, EventArgs e)
   {
       string path = HttpContext.Current.Request.Url.PathAndQuery;
       string pagequery = path.Substring(path.LastIndexOf("/") + 1);
       string[] pagequery_Elements = pagequery.Split('?');
       string ReturnUrl = pagequery_Elements[pagequery_Elements.Length - 1];

       if (ReturnUrl.Contains("ReturnUrl"))
       {         
           Response.Redirect("~/login.aspx", true);
       }
   }

before my url was //...login.aspx?ReturnUrl=%2fReport%2fDefault.aspx
on doing this Returnurl in login page problem was overcomed..
i dont want to use aspnet membership recover password
my web.config

<authentication mode="Forms">
      <forms name=".ASPXFORMSAUTH" loginUrl="login.aspx" protection="All" path="/" timeout="43200"    requireSSL="false"
      slidingExpiration="true"
      cookieless="UseCookies"
      enableCrossAppRedirects="false" />
    </authentication>

//MY PROBLEM
I want to redirect user to next page on clicking a linkbutton... from login page
my buttonclick event doesnt redirects to next page..and redirects to login page itself.. from global.asax ..
How to overcome this..?
Please help me..
thanks in advance..