没有检测到aws-sdk库netbeans

I'm coding a Java application using Netbeans. The database is hosted in DynamoDB (Amazon Web Services). I have downloaded the .jar file (aws-java-sdk-1.3.6.jar) from the Amazon website and tried to add it to my project. However, it is not working. I have followed the usual steps to add a .jar to a project (Tools -> Library -> New Library -> Add JAR/Folder). However, it does not seem to work. The imports I need to code the access to the DB are not recognised. I get the error "package com.amazonaws does not exist".I'm coding a Java application using Netbeans. T