SQL2008无效的连接错误

安装2008后，用连接工具已经可以登陆SA账号，但是程序连接总是提示无效的连接80004005错误，程序段如下：CString strIP = ini.GetValue( "DBSetup", "IP", "127.0.0.1" );
    CString strDBName = ini.GetValue( "DBSetup", "DBName", "apollo" );
    CString strUserName = ini.GetValue( "DBSetup", "UserName", "sa" );
    CString strPassword = ini.GetValue( "DBSetup", "Password", "apollo" );

    CString strConnection = _T("Provider=SQLOLEDB;Network Library=DBMSSOCN;Data Source=" + strIP \
        + ";Initial Catalog=" + strDBName \
        + ";User Id=" + strUserName \
        + ";Password=" + strPassword + ";");
   
    if ( g_db.Open(strConnection) == FALSE )
    {
        CSetupSheet sheet("系统设置", NULL, 0);
        
        if ( sheet.DoModal() != IDOK )
            return FALSE;
        
        strConnection = _T("Provider=SQLOLEDB;Network Library=DBMSSOCN;Data Source=" + sheet.m_wndDBPage.m_strIP \
            + ";Initial Catalog=" + sheet.m_wndDBPage.m_strDBName \
            + ";User Id=" + sheet.m_wndDBPage.m_strUserName \
            + ";Password=" + sheet.m_wndDBPage.m_strPassword + ";");
        
        if ( !g_db.Open(strConnection) )
            return FALSE;
    }