Help for Ext module not working in Code assist

[mrk]

I am using Eclipse 4.2.1 with ext-4.2.1.833. I have installed as instructed in many of the threads. However I am getting zero code completion for Ext . Upon performing a control-space Ext does NOT appear in the code assist drop-down list as some of the screenshots show. It starts with Infinity.

Any suggestions on what might being going wrong?

[eric_suen]

make sure ext-4.2.1.883.jsb2 is under Ext root folder, and make sure Ext Base is checked, if you still have issue, could you please post a screenshot of your javascript profile?