D2005 ADO problem: multiple-step OLE DB operation generated errors

hi all:
I migrate my ADO application from Delphi 7 to Delphi 2005. everything
compiled OK,
but in run time, when I open a table, error occurs: multiple-step OLE DB
operation generated errors.Check each OLE DB status value, if available. No
work was done.
What thanges of ADO between Delphi 2005 and Delphi 7? my application run
fine when compiled with delphi 7!

how to resolve this problem?
thanks.


.

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