Publish failed. Server responded with status-code 404

[Costa]

Hello,

I've changed from PRD 6.0 to PRD 7.1, and now when I try to publish a report on server, I get the following error.

2017-05-25 12:11:37,350 [ 862519]  ERROR - org.pentaho.reporting.designer.extensions.pentaho.repository.actions.PublishToServerTask - Publish failed. Server responded with status-code 404

This error occurs on the last step, right after I choose the location and report name.

Any idea what I'm I doing wrong?

EDIT: I thonk I got it... the server is on 6.0.0.0-353...