After Inserted, can't update the record

Hi all:

 

Please Help me. I use 7.1.3 and odbc version 07.01.0009 . Use Borland C++ Builder 5.0 through BDE And it have the strange action. 

First, I insert a new record and  post it . 

After that, I modify the record, post it again.

Then, the BDE give me a error message "Couldn't perform the edit because another user changed the record."

 

Finally, my program can't work.

If I use TDBGrid, I can find that I Insert a new record and post it, then the record will dispel. 

 

Regards, 

Richard Yang