I started this question: http://answers.ros.org/question/29272/plugin-from-package-mapping_rviz_plugin-not-loaded but now I can't comment on the answers from others (I can comment on my own) and neither could I edit my own post (today, answers.ros seems to be allowing me to edit).

I found this question and thought it is cross-talked with my account: http://answers.ros.org/question/29475/plugin-from-package-mapping_rviz_plugin-not-loaded. But there it says Ubuntu 10.10, so may be it is just someone who think alike with me.

I want to answer this question: http://answers.ros.org/question/29623/moving-hand-fast-cause-handdetector-7-process-to, but answers.ros does not let me. There is a button "Answer Your Own Question" that does not work and there is "edit" click. Another cross-talk?

Anyone has idea what am I doing wrong here? Thanks.