unable to connect SQL server 2005 VC++ using ATL and window auth

I can connect to DB without using winAuth, but not ok if I using winAuth.

Here is the permission setting, I am using EFTG\eftg_app_svc

I cannot post image, but I believe I have correct permission setting.

And configured the SQL server can use window auth.

And here is my code:

HRESULT OpenDataSource()
    {
        HRESULT     hr;
        CDataSource db;
        CDBPropSet  dbinit(DBPROPSET_DBINIT);
    if (m_DBCfg.GetWindowsAuthFlag())
    {
        dbinit.AddProperty(DBPROP_AUTH_INTEGRATED, OLESTR("SSPI"));
    }
    else
    {
        dbinit.AddProperty(DBPROP_AUTH_PASSWORD, OLESTR(""));
        dbinit.AddProperty(DBPROP_AUTH_USERID, m_DBCfg.GetDatabaseUsername());
    }
    dbinit.AddProperty(DBPROP_INIT_CATALOG, m_DBCfg.GetDatabaseName());
    dbinit.AddProperty(DBPROP_INIT_DATASOURCE, m_DBCfg.GetDatabaseServer());
    dbinit.AddProperty(DBPROP_INIT_LCID, (long)1033);
    dbinit.AddProperty(DBPROP_INIT_PROMPT, (short)4);
    dbinit.AddProperty(DBPROP_INIT_OLEDBSERVICES, DBPROPVAL_OS_RESOURCEPOOLING);
    hr = db.OpenWithServiceComponents(_T("SQLOLEDB.1"), &dbinit);
    if (FAILED(hr))
        return hr;

But DB eventlog: -> Login failed for user 'EFTG\eftg_app_svc'. [CLIENT: ] What's wrong???

Thanks very much!!