ASP.NET - VB.NET - SQL Server 2K - "Input string was not in a correct format"

Hey,

I'm stumped at this point and I'm tired of trying things so I'm posting in hopes of some guru with a sharp eye.  I have an asp.net app running on a local Win XP Pro box.  Within the app, I call a SPROC and pass the info to the SQL box and it hiccups.  I'll drop VS.NET into debug mode and step through the SPROC creation and copy those values into Query Analyzer to get a little more info.  When I run the Query Analyer that data works just fine.  That means there isn't a problem with the data type and the database.  What is happening is that I'm passing a parameter that does not match in data type or length with the expected parameter.  

Here's the error:

System.FormatException: Input string was not in a correct format.

Here's my code:

------ASP.NET CODE---------------------
Dim parameterCustID As SqlParameter = New SqlParameter("@customerID", SqlDbType.Int, 4)
parameterCustID.Value = customerID
orderCommand.Parameters.Add(parameterCustID)

Dim parameterDateOrdered As SqlParameter = New SqlParameter("@dateOrdered", SqlDbType.DateTime, 8)
parameterDateOrdered.Value = Today
orderCommand.Parameters.Add(parameterDateOrdered)

Dim parameterProductOrdered As SqlParameter = New SqlParameter("@productOrdered", SqlDbType.VarChar, 255)
parameterProductOrdered.Value = productOrdered
orderCommand.Parameters.Add(parameterProductOrdered)

Dim parameterQuantity As SqlParameter = New SqlParameter("@quantity", SqlDbType.SmallInt, 2)
parameterQuantity.Value = CInt(quantity)
orderCommand.Parameters.Add(parameterQuantity)

Dim parameterCost As SqlParameter = New SqlParameter("@cost", SqlDbType.SmallMoney, 4)
parameterCost.Value = price
orderCommand.Parameters.Add(parameterCost)

Dim parameterComments As SqlParameter = New SqlParameter("@comments", SqlDbType.NVarChar, 255)
parameterComments.Value = Trim(txtComments.Text)
orderCommand.Parameters.Add(parameterComments)

Dim parameterCCNum As SqlParameter = New SqlParameter("@CCNum", SqlDbType.VarChar, 50)
parameterCCNum.Value = Trim(txtCardNumber.Text)
orderCommand.Parameters.Add(parameterCCNum)

Dim parameterExpDate As SqlParameter = New SqlParameter("@ExpDate", SqlDbType.VarChar, 50)
parameterExpDate.Value = expDate
orderCommand.Parameters.Add(parameterExpDate)

Dim parameterCCV As SqlParameter = New SqlParameter("@CCV", SqlDbType.VarChar, 3)
parameterCCV.Value = Trim(Issue.Text)
orderCommand.Parameters.Add(parameterCCV)

Dim parameterorderID As SqlParameter = New SqlParameter("@orderID", SqlDbType.Int, 4)
parameterorderID.Direction = ParameterDirection.Output
orderCommand.Parameters.Add(parameterorderID)

orderCommand.ExecuteNonQuery()

' Return the OrderID
Dim orderID As Integer = parameterCustomerID.Value
--------------------------

-------SPROC in SQL 2K-------------------
CREATE Procedure addOrder
(
    @customerID int,
    @dateOrdered datetime,
    @productOrdered varchar(50),        
    @quantity smallint,
    @cost smallmoney,
    @comments nvarchar(255),
    @CCNum varchar(50),
    @ExpDate varchar(50),
    @CCV varchar(3),
    @OrderID int OUTPUT
)

AS

/* Create the Order header */
INSERT INTO psiOrders
(
    customerID,
    dateOrdered,
    productOrdered,
    quantity,
    cost,
    comments,
    CCNum,
    ExpDate,
    CCV
)
VALUES
(  
    @customerID,
    @dateOrdered,
    @productOrdered,
    @quantity,
    @cost,
    @comments,
    @CCNum,
    @ExpDate,
    @CCV
)
SELECT
    @OrderID = @@Identity
GO
--------------------------

-----Query Analyzer Data---------------------
INSERT INTO psiOrders
(
    customerID,
    dateOrdered,
    productOrdered,
    quantity,
    cost,
    comments,
    CCNum,
    ExpDate,
    CCV
)
VALUES
(  
    40,
    9/22/2004,
    'SSK Scooter Kit',
    1,
    $ 99.00,
    '',
    '4323333588557409',
    '06-2007',
    '182'
)
SELECT
    @@Identity
GO
--------------------------

----my table ---------------------
orderID    int  not null (primary key)
customerID int not null
dateOrdered datetime not null
productOrdered varchar(255) not null
quantity smallint  not null
cost smallmoney  not null
comments nvarchar(255) null
CCNum varchar(50) not null
ExpDate varchar(50) not null
CCV varchar(3)  not null
--------------------------------

The error always kicks up on this line:

'execute the order
orderCommand.ExecuteNonQuery()

System.FormatException: Input string was not in a correct format.

Any ideas?

CML