Parameters being passed to a stored procedure via an exe

What I'm doing is running an exe that will pass 5 parameters from a command line to the exe.  What I can do is to get these parameters to print out to notepad so I know that they are passing ok.  However when I pass them to the stored procedure it is returning an unhandled exception stating that it cannot insert a NULL value into the column USERID - this is relating to the Parameter in the stored procedure @USERCODE.  Does anyone have any suggestions, the stored procedure has not changed and I had this working before.  I've attached the code below.
Dim params() As String = Microsoft.VisualBasic.Command.Replace(", ", ",").Split(",")
        If params.Length >= 5 Then
            UserCode = params(0)
            AccountID = params(1)
            CampCallID = params(2)
            ContactID = params(3)
            Account = params(4)
        End If
        Dim connection As SqlConnection = _
        New SqlConnection("server=SALESLOGIX;Initial Catalog=slxlive;User Id=user;Password=password")
            Dim command As SqlCommand = _
           New SqlCommand("sysdba.sp_createpopact", connection)
            command.CommandType = CommandType.StoredProcedure
            command.Parameters.AddWithValue("@USERCODE", UserCode)
            command.Parameters.AddWithValue("@ACCOUNTID", AccountID)
            command.Parameters.AddWithValue("@CAMPCALLID", CampCallID)
            command.Parameters.AddWithValue("@CONTACTID", ContactID)
        Catch ex As Exception
        End Try
    End Sub

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Jorge PaulinoIT Pro/DeveloperCommented:
Can you show us the result of this:
            UserCode = params(0)
            AccountID = params(1)
            CampCallID = params(2)
            ContactID = params(3)
            Account = params(4)
meteorelecAuthor Commented:
Yeah I can show the results of all these parameters.
Jorge PaulinoIT Pro/DeveloperCommented:
I'm still waiting to see !
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meteorelecAuthor Commented:
Sorry I'll sort it now, do you just want what I can output into notepad.
meteorelecAuthor Commented:
This is what I can output to notepad to prove that it is passing the parameters from the command line, U0HOCA000002 is the Usercode, test2AID is the AccountID, test3CID is the CampcallID, test4ConID is the ContactID and test5ACC is the Account.
Jorge PaulinoIT Pro/DeveloperCommented:
Well you have 5 parameters and only four used in the code. Maybe the missing one is causing the error!

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Visual Basic.NET

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