WSUS Agent - Not Yet Reported

I installed and configured Windows Server Update Services (WSUS) 3.0 SP2 in our infrastructure. I don't use client side targeting to group computers' account. I noticed something's not right because after I had waited for more than half an hour, the status of all computers are still Not Yet Reported as per screenshot below.

I have tried to run wuauclt /resetauthorization /detectnow with no success. I even re-installed my WSUS, but the same problem exist. I finally found the fix for this on Microsoft website, I downloaded the hotfix for WSUS 3.0 SP2 from this link below 

http://support.microsoft.com/kb/2720211

Hopefully this helps everyone who faces the same issue.