One Row Returned But E.AffectedRows ==0?

Stored Procedure:
CREATE PROCEDURE [dbo].[GetBanner]

    @BannerPage nvarchar(50),
    @MagazineID int
AS
BEGIN
    SET NOCOUNT ON;

    DECLARE @BannerID int
    SELECT TOP 1
    @BannerID = BannerID
    FROM Banners
    WHERE BannerPage=@BannerPage AND MagazineID = @MagazineID
    AND StartDate <= GetDate() AND EndDate >=GetDate()
    ORDER BY Views

    SELECT
     BannerID,
     BannerFileName,
     AltText,
     URL,
     Views
     FROM Banners
     WHERE BannerID = @BannerID
     
     UPDATE Banners SET Views = Views +1 WHERE BannerID = @BannerID
     UPDATE BannerStats SET Views = Views + 1 WHERE BannerID = @BannerID
END
OnSelected method:
 protected void dsBanner_Selected(object sender, SqlDataSourceStatusEventArgs e)
    {
        int RecordCount = e.AffectedRows;
            Response.Write(RecordCount);
    }
 
 This ALWAYS gives me 0 - despite the fact that the correct banner is pulled from the database, and updated etc.  Also, when I execute the procedure (for valid parameter values) in SSMS, I get "1 row(s) Affected".  Can anyone tell me what I need to change to get the proper value?
 Thanks