"Record/Key Deleted" Error

Hi,

I'm working with MS SQL 6.0. + Delphi C/S 2.0 + Borland SQL Links.

The problem I have is :

   when I'm using TTable for inserting
   new record into the table on SQL,
   exception 'Record\Key Deleted' generated by Delphi.

Would you mind to tell me how to solve this problem.

        Konstantin