Programming Forums - PageBoardID?

I am trying to customize an open source BB done in ASP.NET/C# (www.YetAnotherForum.net). The login function has a variable (int) called PageBoardID, but I can't figure out what it is for. It always appears to be 1, regardless of how many browsers I throw at it. I'm thinking about just hard coding this value to 1 for simplicity, but without knowing what it does, I obviously am a little hesitant.

The code for this function is as follows:

string sPassword = FormsAuthentication.HashPasswordForStoringInConfigFile( Password.Text, "md5" );

object userID = DB.user_login( PageBoardID, UserName.Text, sPassword );            



if ( userID != DBNull.Value )

{

        string idName = string.Format( "{0};{1};{2}", userID, PageBoardID, UserName.Text );

        if ( Request.QueryString ["ReturnUrl"] != null )

        {

                FormsAuthentication.RedirectFromLoginPage( idName, AutoLogin.Checked );

        }

        else

        {

                FormsAuthentication.SetAuthCookie( idName, AutoLogin.Checked );

                Forum.Redirect( Pages.forum );

        }

}

else

{

        AddLoadMessage( GetText( "password_error" ) );

}

I know this is pretty vague, but does anyone have any guesses on what this variable is for? After spending hours stepping through the code, I'm having a lot of difficulty figuring out it's purpose ... especially when it always appears to be 1.

Thanks in advance.