AccessDeniedException while storing file in Slide 2.1

Hi!

I've got strange error while using 2.1. Can somebody tell me where I'm wrong

I'm using Domain.xml from slide.war

I've got

org.apache.slide.security.AccessDeniedException: Access denied on 
/users/activepages by user /users/root for action /actions/write
    at 
org.apache.slide.security.SecurityImpl.checkCredentials(SecurityImpl.java:427)
    at 
org.apache.slide.structure.StructureImpl.store(StructureImpl.java:488)
    at 
org.apache.slide.structure.StructureImpl.store(StructureImpl.java:458)
    at 
org.apache.slide.structure.StructureImpl.create(StructureImpl.java:380)
    at Test.test(Test.java:31)

in the snippet

        URL resource = getClass().getResource("domain.xml");
        Domain.init(resource);
        SecurityToken token = new SecurityToken("");
        NamespaceAccessToken accessToken = 
Domain.accessNamespace(token,"slide");

        CredentialsToken credToken = new CredentialsToken("/root");
        SlideTokenImpl slideToken = new SlideTokenImpl(credToken);
       
        SubjectNode collection = new SubjectNode();

        accessToken.begin();
        
accessToken.getStructureHelper().create(slideToken,collection,"/users/mydirectory");
        accessToken.commit();


Bu the most wired thing is that it crushes at 
SecurityImpl.checkCredentials(SecurityImpl.java:403)

ObjectNode realObject = objectUri.getStore().retrieveObject(objectUri);

So it cannot even get object from the store

Thanks!