[AccessD] Set Warnings Problem - Environment Access 2003

Set Warnings problem - Environment Access 2003
   
  A problem has recently developed on one of my PCs
   
  I can not get any warning messages to display when running delete, update, append or Make-table queries.
   
  I use docmd.setwarnings = true - Immediately followed by execution of the query 
   
  The query runs and does the update etc., but there are no warning messages.
   
  The same problem (No Warning Message) occurs when I run the query by just double clicking on it
   
  This problem occurs on all Access 2003 databases run on this machine. If I use a different machine with the same query with the same database I get the warning messages. Access 2003 has been re-installed on this PC but the problem continues to occur.
   
  But the problem does not occur on Access97 databases. 
   
  Is there some environment setting that I inadvertently changed? If so, what is it?
   
  Any advice would be appreciated.