Insert Does Not Take Place If Stored Procedure Is Run From ASP.NET

Hello,

I am having an issue with the insert command in a stored procedure in SQL Server 2005. The procedure is designed to generate a Customer number and insert an initial value (a delivery charge) into an order table. Finally, it returns the customer number back to the caller. When I execute the stored procedure from SQL Server Management Studio, it works perfectly. However, when I call it from ASP.net, the procedure properly generates a Customer Number and returns it to my application, but the insert never takes place. Can someone help me figure out why it won't insert?

My ASP.Net (C#) code is here: SqlDataSource dsSelect = new SqlDataSource();
dsSelect.ConnectionString = ConfigurationManager.ConnectionStrings["obeConn"].ConnectionString;
dsSelect.SelectCommandType = SqlDataSourceCommandType.StoredProcedure;
dsSelect.SelectCommand = "getTempCustNo";

DataView reader = (DataView)dsSelect.Select(DataSourceSelectArguments.Empty);

Session["CustNo"] = reader[0]["CustNumber"].ToString().Trim();
Session["PriceCode"] = reader[0]["PriceCode"].ToString().Trim();
Session["orderNo"] = reader[0]["OrderNo"].ToString().Trim();  

  My stored procedure is here:ALTER PROCEDURE [dbo].[getTempCustNo]
AS
BEGIN
declare @CustNo int;
declare @prodDesc VARCHAR(max);
declare @prodNo int;
declare @stdPrice float;
declare @orderNo int;
declare @priceCode int;

-- populate values
SELECT @custNo = ISNULL(MAX(OD_CUSTNO)+1, 100000000), @prodNo = 999, @orderNo = 1, @priceCode = 1000
FROM [dbo].[tblOrderDet]
WHERE OD_CUSTNO >= 100000000;

-- get the price of our product
SELECT @stdPrice = PR_RATE_1
FROM tblPrices
WHERE PR_PRODNO = @ProdNo
AND PR_RCDCOD = @priceCode;

-- get the description
SELECT @ProdDesc = PM_PRDESC + ' ' + PM_VOLUME FROM dbo.tblPromas WHERE PM_PRODNO = @ProdNo;

--Add a delivery charge to the customer's order table
INSERT INTO tblOrderDet (OD_ORDRNO, OD_CUSTNO, OD_PRODNO, OD_QUANTITY, OD_ORG_QUANTY, OD_PRICE, OD_DESCR, OD_LOW)
VALUES (@orderNo, @CustNo, @prodNo, 1, 0, @stdPrice, @prodDesc, 'N');

--Return the customer values
SELECT @custNo AS 'CustNumber', @orderNo AS 'OrderNo', @priceCode AS 'PriceCode';
END