🚀 go-pugleaf

Hi,
I have a problem inserting autoicrement primary key field with TADODataset. 
I am using MS access 2000.
I am now using C++ builder 2006. Previously I was using c++ builder 5.
I am converting my c++ builder 5 project to C++ builder 2006 and the code 
that was running in C++ builder 5 in not working in C++ builder 2006.
The code is as follows:
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  Form1->Calibration = 0;
 Form1->StoringADODataSet->Close();
 Form1->StoringADODataSet->CommandType=cmdText;
 Form1->StoringADODataSet->CommandText="SELECT * FROM  CALIBRATION";
 Form1->StoringADODataSet->Open();


 for (int i=12;i<230+1;i++)
 {
          Form1->Calibration++;
          Form1->StoringADODataSet->Insert();
          Form1->StoringADODataSet->FieldValues["CalibrationID"]= 
Form1->Calibration; /*autoincrement field*/
          Form1->StoringADODataSet->FieldValues["Coef0"]=0 ;
          Form1->StoringADODataSet->FieldValues["Coef1"]=1;
          Form1->StoringADODataSet->FieldValues["Coef2"]=2 ;
          Form1->StoringADODataSet->FieldValues["Coef3"]=3;
          Form1->StoringADODataSet->FieldValues["TimeStamp"] = 
DateTimeToStr(Now());
          Form1->StoringADODataSet->FieldValues["CalibrationName"] = "sms";

          Form1->StoringADODataSet->Post();
          Form1->StoringADODataSet->UpdateBatch(arCurrent);
 }
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In c++ builder 2006, I get the error " Field 'CalibrationID' cannot be 
modified ". where as in C++ builder 2005, i have no such error.
Any ideas???
Regards,
Siraj