You MUST have a 64bit computer and operating system... what is your computer?
-Programs are not SUPPOSED to display or download if they will not install on your computer
MINIMUM for After Effects and Premiere Pro http://helpx.adobe.com/premiere-pro/system-requirements.html
I have tried the method via installing CreativeCloudInstaller, it does not show AE in the application list.
John is right, it seems like I do not meet the minimum requirement for installing AE, my computer is in 32bit instead of 64bit.
It would be more helpful if they showing more accurate message in the CC installer and the Free Trial link page in Adobe website.
Thanks a lot for all the supports!