Ошибка подключения к таблице FoxPro в c++ приложении

void DBManager::initHandles()
{
    // Allocate environment handle  OK
    ret = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &env);
    if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) {
        printf("**SQLSetEnvAttr** Failed to allocate environment handle.\n");
    }
 
    // Set ODBC version to 3.0      OK
    ret = SQLSetEnvAttr(env, SQL_ATTR_ODBC_VERSION, (SQLPOINTER)SQL_OV_ODBC3, SQL_IS_INTEGER);
    if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) {
        printf("**SQLSetEnvAttr** Failed to set ODBC version.\n");
        SQLFreeHandle(SQL_HANDLE_ENV, env);
    }
 
    // Allocate connection handle   OK
    ret = SQLAllocHandle(SQL_HANDLE_DBC, env, &dbc);
    if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) {
        printf("**SQLAllocHandle** Failed to allocate connection handle.\n");
        SQLFreeHandle(SQL_HANDLE_ENV, env);
    }
 
    // Connect to the database      
    SQLWCHAR* connectionString = (SQLWCHAR*)"DRIVER={Microsoft Visual FoxPro Driver};SourceType=DBF;SourceDB=<D:/table/_table.dbf>;";
    ret = SQLDriverConnect(dbc, NULL, connectionString, SQL_NTS, NULL, 0, NULL, SQL_DRIVER_NOPROMPT);
    if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) {
        printf("**SQLDriverConnect** Failed to connect to the database.\n");
        SQLFreeHandle(SQL_HANDLE_DBC, dbc);
        SQLFreeHandle(SQL_HANDLE_ENV, env);
    }
 
    // Allocate statement handle    
    ret = SQLAllocHandle(SQL_HANDLE_STMT, dbc, &stmt);
    if (ret != SQL_SUCCESS && ret != SQL_SUCCESS_WITH_INFO) {
        printf("**SQLAllocHandle** Failed to allocate statement handle.\n");
        SQLDisconnect(dbc);
        SQLFreeHandle(SQL_HANDLE_DBC, dbc);
        SQLFreeHandle(SQL_HANDLE_ENV, env);
    }
}