DataSet.Refresh doesn't work?

I use the delphi5 + Ado + SQL Server
in my program,i use the stored procedure change data in some table,i hope i can use the taodtable.refresh to get the changed,but i get nothing,why?
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That's for "Optimistic Locking". Only fields NOT changed are refreshd. Easiest solution (no, it was not my idea):

if then

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I've used the .requery command to refresh data in ADO...

Note: this command closes and re-open the table or query; cursor moves to the first record.
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