Why can't i create a role?
I can create a account. but when i create a role with admin, the page only change the advertisement. There isn't a new role in the database.
I can do it before i rebuild the site
I have not changed the code
please help!

I've seen this myself, but I played around with it and got it working.

I think the problem may be that your event is not hooked correctly. Look at the hidden Web form designer code in Roles.aspx.cs (assuming C# version) and look for this:

this.NewRoleButton.Click += new System.EventHandler(this.NewRoleButton_Click);
this.Load += new System.EventHandler(this.Page_Load);

If you have these 2 lines, then something else is messing up your event handling. Put a breakpoint in the handler for NewRoleButton_Click. See if this breakpoint is hit when you press the button. If your event handling is messed up, then this handler is not being called.

I wish I could remember exactly what caused my problem, but I can't remember the details right now.

Eric

There aren't two lines in the code, it is the code as the below

private void NewRoleButton_Click(object sender, System.EventArgs e)
        {
            int newId;
            Role newRole = new Role();
            newRole.Description = NewRoleDescription.Text;
            newId = newRole.Create();

            DataRow roleRow = roles.Tables["Roles"].NewRow();
            roleRow["Description"] = NewRoleDescription.Text;
            roleRow["RoleID"] = newId;
            roles.Tables["Roles"].Rows.Add( roleRow );

            RoleList.DataSource = roles.Tables["Roles"];
            RoleList.DataBind();
            NewRoleDescription.Text = "";
        }

please help

You didn't look in the region for the Web desiger created code like I asked you to.

The button click procedure is where I asked you to put a breakpoint. Put a breakpoint on this line:
Role newRole = new Role();

Run the App, click on the button, and see if you can single-step thru the creation of the role object.