Exception in CRecordset::Open()

int CDB::OpenConnection(CString strDSN, CString& strErr)
{
    CloseConnection();
      
    CString str = CString("ODBC;DSN=") + strDSN;

    m_Database.Open(str);

    m_pPointSet = new CPointSet(&m_Database);
    m_pGlobalSet = new CGlobalSet(&m_Database);
    m_pFormulaSet = new CFormulaSet(&m_Database);

    TRACE("*******DB's OpenConnection strDSN : %s strErr : %s", strDSN, strErr);

    TRY
    {
         if(!m_pEbExportSet->Open())
        {
            TRACE("*********DB's Connec Error Code in EbExportSet Open : %d", DB_CONNECTION_ERROR);

            return DB_CONNECTION_ERROR;
        }
        else
        {
            TRACE("**************No Exception " );
        }

        if(!m_pFormulaSet->Open())
        {
            TRACE("*********DB's Connec Error Code in FormulaSet Open : %d", DB_CONNECTION_ERROR);

            return DB_CONNECTION_ERROR;
        }
        else
        {
            TRACE("**************No Exception " );
        }
        if(!m_pGlobalSet->Open())
        {
            TRACE("*********DB's Connec Error Code in GlobalSet Open : %d", DB_CONNECTION_ERROR);

            return DB_CONNECTION_ERROR;
        }
        else
        {
            TRACE("**************No Exception " );
        }
    }
    CATCH_ALL( e )
    {
        LPTSTR lpErr = strErr.GetBuffer(255);
        e->GetErrorMessage(lpErr, 255);
        strErr.ReleaseBuffer();
        TRACE("Error String : %s ", strErr);

        LogException(strErr, "OpenConnection");

        TRACE("................logged.............\n");

        return DB_EXCEPTION;
    }
    END_CATCH_ALL

    return SUCCESS;
}