SQL Query Analyzer reports "Syntax error converting datetime from character string."

It doesn't like the empty datetimes. How do I insert an empty datetime?

insert into commits 
  (donedatetime, invdate, duedate, fromdate, todate, invoiceid, oldetype, discnotes,
   batchid, adjamt, isci, dayofwk, userid, refnum, statname, status ) 
 values ('07/30/2004 10:54:45', '06/01/2004 00:00:00', '07/01/2004 00:00:00', 
         '  /  /       :  :  ', '  /  /       :  :  ', '1927-01             ', 
         ' ', '', 'AO0NBDRX', '0', '               ', '  ', 'JVILLAGOMEZ         ', 
         '4003978', 'WUPW      ', '1')