For MSSQL, Try changing:
.CommandText = "PARAMETERS paramID Long, paramTable Text(255), paramDesc Text(255), paramExtn Text(5), paramFile LongBinary;" & _
"INSERT INTO tblBLOB (FKID, FKTable, BLOBDesc, FileExtn, BLOB) " & _
"SELECT paramID, paramTable, paramDesc, paramExtn, paramFile"
...to...