Form authotication problem

I am using form authotication in my web application and used to may custom design for login page.

after authorised user i set this line:

FormsAuthentication.RedirectFromLoginPage(txtLoginName.Value, blnFlag);

but after this line execute page can not redirect default page.


in my web.config file setting is:


     
   
   
     
   



what i do to redirect page to default page.

Thanks in advance