How many devices did you authorize with the same credentials ?
in addition to shreya's hint, please have a look there >>> http://helpx.adobe.com/creative-cloud/help/install-apps.html >>> How many computers can I install on
I quote: You may install software on up to two computers. These two computers can be Windows, Mac OS, or one each.
... and it could be that you have to use Creative Cloud Help | Install, update, or uninstall apps
Esp. if you want to install on a third computer, CC it will request you to de-activate on the other two computers. You can then reactivate one of the previous two computers, and use Creative Cloud apps on it.