🚀 go-pugleaf

I am using ADO Tables and trying to write to a Blob Field in C++
Builder 5. The BlobStream is operating fine and I have verified that
my data is written to it.
But following a Post command, which should send it to the ADO Table
(Access 97 Database), the BlobStream is not written into the database.
The field where it should be is empty. Here is an extract of one of
the many methods I have
tried:

TADOBlobStream *lStream = NULL;
short int num;
lStream = (TADOBlobStream*)pTrendTable->CreateBlobStream(pTrendTable->FieldByName(MPWM_PARAM_TREND),bmReadWrite);
for (int i = 0; i < 1000; i++)
{
   // Store param value as short int in blob-stream
   num = (short int)i * 2;
   lStream->Write(&num, sizeof(short int));
}
pTrendTable->FieldByName(MPW_SYSTEM_ID)->AsString = lSystem_ID;
pTrendTable->FieldByName(MPW_STUDY_ID)->AsString = lStudy_ID;
pTrendTable->FieldByName(MPW_PATIENT_NO)->AsInteger = lPatient_No;
pTrendTable->FieldByName(MPWM_SESSION_ID)->AsInteger = lSession_ID;
pTrendTable->FieldByName(MPWM_PARAM_ID)->AsInteger = np + 1;
pTrendTable->Post();
delete lStream;
lStream = NULL;

   Values are posted to all the above fields except the BlobField. I
am using Microsoft Jet 4.0 OLE DB Provider.

If anyone can help, it would be greatly appreciated.

Cheers,
Paul