Click default bucket under monitor section reloads to server page

Created an attachment (id=374)
error when click on default bucket

Install northscale server 1.6.0beta2rc1-13 on rhel 5.4 32 bit
Go through the initial setup and northscale web console up
Click on Data Buckets then on default link
http://screencast.com/t/OWYwM2FkM
Web console self reloads back to server page
http://screencast.com/t/YzNiNGQ1Z
Then click on "Cluster Overview", got the red banner error
http://screencast.com/t/ZDViMDlm