Hi, I try to open large object IfxBlob but an error appears. see the code and error

DbParameter dbParameter = null;

//Read the file
StreamReader strmRdr = new StreamReader(filePath);

//Open the connection
OpenConnection();

//Create smart locator
IfxSmartLOBLocator IfxSmartLOBLoc = new IfxSmartLOBLocator(strmRdr.ReadToEnd());
//Create IfxClob
IfxClob myClobVal = new IfxClob((IfxConnection)m_connection);

myClobVal.EstimatedSize = 49000;
myClobVal.ExtentSize = 100;
myClobVal.Flags = (int)IfxSmartLOBCreateTimeFlags.KeepAccessTime
| (int)IfxSmartLOBCreateTimeFlags.NoLog;
myClobVal.MaxBytes = 45000;
//Open IfxClob
//Here I got the error "ERROR [HY000] [Informix .NET provider][Informix]Smart-large-object error."
myClobVal.Open(IfxSmartLOBOpenMode.ReadWrite);


Thanks for UR help