apologies for the delayed response. I think you need to enable the index service at the initial setup and I don’t believe you have that given the log files present in this directory.
see the 3 checkboxes displayed here that will get you to have a cluster with indexing service.
http://developer.couchbase.com/documentation/server/4.0/clustersetup/cluster-setup-ui.html
there is a quickstart guide that will get you set up with RC0 that we are shipping as we speak.
http://developer.couchbase.com/documentation/server/4.0/getting-started/installing.html
thanks
-cihan