Unable to do join in Data Source Wizard.

Hi Everyone,

I'm new to Pentaho and start exploring on Community Edition. I tried to do join in Data Source Wizard but the fields not showing like screen shot below. How do I fix this?
Screen Shot 2014-05-08 at 1.40.44 PM.jpg

Attached Images

• Screen Shot 2014-05-08 at 1.40.44 PM.jpg (23.1 KB)