Select NULL into table

I have a table with 2 columns that allow NULL.  I am attempting to create a SP that will populate this table.  It is as follows:

INSERT INTO TitleApproval

SELECT     GETDATE() AS FaxDate, Stock.StockID

FROM         Stock INNER JOIN
                      AssignorStock ON Stock.AssignmentID = AssignorStock.AssignmentID INNER JOIN
                      Assignor ON AssignorStock.AssignorID = Assignor.AssignorID INNER JOIN
                      RFStockStatus ON Stock.StockStatusInd = RFStockStatus.StockStatusID
WHERE     (Assignor.ParentCompanyID = 7812) AND (Stock.StockStatusInd = 64)
GROUP BY Stock.StockID
HAVING      (NOT (Stock.StockID IN
                          (SELECT     TitleApproval.StockID
                            FROM          Stock AS Stock_1 INNER JOIN
                                                   TitleApproval ON Stock_1.StockID = TitleApproval.StockID
                            WHERE      (Stock_1.StockStatusInd = 64) AND (TitleApproval.Approve IS NULL) OR
                                                   (Stock_1.StockStatusInd = 64) AND (TitleApproval.Approve = '1'))))

Yet, when I attempt to create the SP, I get this error "Insert Error: Column name or number of supplied values does not match table definition."  I need to insert NULL values into these columns, but I am brain dead today and cannot figure out how to.