I'm having some problem with try and catch is not displaying the exception message

protected void btnRegisterUsers_Click(object sender, EventArgs e) { User addusers = new User(); string salt = CreateSalt(5); addusers.Username = txtusername.Text; //for combination of password and salt string saltandpassword = string.Concat(txtpassword.Text, salt); //now hashed them together for the saltandpassword together string hashedpassword = FormsAuthentication.HashPasswordForStoringInConfigFile(saltandpassword, "SHA1"); addusers.Password = hashedpassword; addusers.Salt = salt; addusers.Firstname = txtfirstname.Text; addusers.Lastname = txtlastname.Text; addusers.Email = txtemailaddress.Text; int roleid = Int32.Parse(ddrolelist.SelectedValue); addusers.Roleid = roleid; bool confirmation = false; LansAsianGrill ApplicationManager = new LansAsianGrill( ...