Could not import other modules

Hi all,

I’m a newbee of react native. I was stuck with the following trouble.

When I use other modules in developing application, I import them using the below code.
import ReactNativeAN from 'react-native-alarm-notification';

I did npm install react-native-alarm-notification --save and react-native link react-native-alarm-notification, but ReactNativeAN which I imported was still undefined primitive.

Do you know why and how to solve it ?