error using DropbBox api v2

Hello 

I downloaded the latest sdk using maven :

<dependency>
    <groupId>com.dropbox.core</groupId>
    <artifactId>dropbox-core-sdk</artifactId>
    <version>2.0-beta-1</version>
</dependency>

Then I create a project and I added the following jars:
dropbox-core-sdk-2.0-beta-1.jar
dropbox-core-sdk-1.7.7.jar
dropbox-core-sdk-0-SNAPSHOT.jar
jackson-core-2.2.4.jar
jackson-databind-2.7.0-SNAPSHOT.jar

And then i tried to run the following example using a valid token:

 

DbxRequestConfig config = new DbxRequestConfig("dropbox/java-tutorial", "en_US");

        DbxClientV2 client = new DbxClientV2(config, ACCESS_TOKEN);

        try {

Users.FullAccount account = client.users.getCurrentAccount();

System.out.println("account "+account.email);

} catch (DbxException e) {

System.out.println(e.getMessage());

}

And I encountered the following error:

Exception in thread "main" java.lang.NoSuchFieldError: VoidReader

at com.dropbox.core.v2.Users.getCurrentAccount(Users.java:1403)

at dropbox.DropBox.gread(DropBox.java:18)

at dropbox.DropBox.main(DropBox.java:28)

 Can you tell me what I am doing wrong. The token is good for v1 sdk api.

Best Regards,

Aurelian