**All the views given here are my personal and has no relation or doesn't reflect views of my employer.
Hi Seung,
Personally, I am NOT fond of using the Click-Map and the only reason is that I experienced that the data given is not accurate enough due to various limitations of the tool. Also, there has not been much upgrades in the product to keep it at par with the fast moving technology 
Now, coming to your question, Here is what you need to do the see the Data Flowing Like Charm in the Click Map reports
1. "s.trackInlineStats" must be set to 'true' within your core JavaScript file (s_code.js)
Example: s.trackInlineStats=true;
I observed in the past that ClickMap plugin doesn't support Safari. It is only my personal observation and I might not be 100% correct
2. Hope you are working on a <a> tag and setting s_objectID as given below:
<a href=http://www.allaboutwebanalytics.com onclick=s_objectID='harsh1234';>Some Site Link</a>
This code snippet allows the link to be reliably identified, and ensure the improved accuracy of reporting.
Do like the post should you find useful by clicking on the "Heart Icon" and move this to "Solved" status for the benefit of other users of the forum.
Hope this helps!
Regards,
Harsh Kabra | Adobe Certified Expert: Digital Analytics & SiteCatalyst Implementation & Reporting