As I am still figuring my problem with the hidden source tab, I came to the note on this page that led me to d/l the plugin version 2.5, which result in JIRA not even loading up due to missing class file. The latest version of 5.0.0m6 didnt resolve my problem with source tab, so I am out of ideas. I have follow everything on permission, application links and they all works, so I am thinking that the plugin is the problem. I have d/l 3.4.6 and that still doesnt work.
I'm currently using JIRA 4.4.1 and Crucible 2.7 on windows 7 machine. Any help is greately appreciate!