Stored Procedure has too many arguments Here is the code for my stored procedure, lots of things going on and lots of parameters being passed. I'm knew to sql and I'm sure there's a far better way of performing these functions but need some help! Thanks in advance! :)

ALTER PROCEDURE [dbo].[spCompleteRepair]

@unit_id INT,
@BasicHB NVARCHAR,
@AdvHB NVARCHAR,
@CCRepair BIT,
@CCReplace BIT,
@Fan NVARCHAR,
@RE BIT,
@notes NVARCHAR,
@bin_num NVARCHAR,
@loc_num NVARCHAR,
@repairserial NVARCHAR

AS

BEGIN

INSERT INTO RepairDetails
    (unit_id, BasicHB, AdvHB, CCRepair, CCReplace, Fan, RE, notes, completion_date)
VALUES
    (@unit_id, @BasicHB, @AdvHB, @CCRepair, @CCReplace, @Fan, @RE, @notes, GETDATE())


UPDATE Units
SET bin_num=@bin_num, loc_num=@loc_num, repair_serial=@repairserial, unit_status=1
WHERE unit_id=@unit_id


UPDATE OutBins 
SET filled=1
WHERE bin_num=@bin_num AND loc_num=@loc_num


UPDATE Orders
SET Orders.order_status = 1
FROM Orders 
--check to see if there are units for the order
WHERE EXISTS (  
        SELECT *
        FROM Units
        WHERE Units.order_id = Orders.order_id
        )
--make sure there are NO units that are not status = 1
    AND NOT EXISTS (
        SELECT *
        FROM Units
        WHERE Units.order_id = Orders.order_id
            AND Units.unit_status &lt;&gt; 1)


END


CODE TO CALL PROCEDURE:

 using (SqlCommand command = new SqlCommand("spCompleteRepair", connection))
                {
                    command.CommandType = CommandType.StoredProcedure;
                    command.Parameters.AddWithValue("@order_id", txtorder_id.Text);
                    command.Parameters.AddWithValue("@unit_id", txtunit_id.Text);
                    command.Parameters.AddWithValue("@BasicHB", ddlBasicHB.Text);
                    command.Parameters.AddWithValue("@AdvHB", ddlAdvHB.Text);
                    command.Parameters.AddWithValue("@CCRepair", ddlCCRepair.Text);
                    command.Parameters.AddWithValue("@CCReplace", ddlCCReplace.Text);
                    command.Parameters.AddWithValue("@Fan", ddlFan.Text);
                    command.Parameters.AddWithValue("@RE", ddlRE.Text);
                    command.Parameters.AddWithValue("@notes", txtNotes.Text);
                    command.Parameters.AddWithValue("@repairserial", txtRepairSerial.Text);
                    command.Parameters.AddWithValue("@bin_num", ddl_binnum.Text);
                    command.Parameters.AddWithValue("@loc_num", ddl_locnum.Text);                   
                    command.Connection.Open();
                    command.ExecuteNonQuery();
                }
The C# code you are using to invoke the stored procedure is passing in @order_id as the first parameter.  That parameter is not referenced in the actual stored procedure.  Try removing that parameter from the C# code.