Hello, Rajshree--
I also purchased a "Commercial Volume License" version of CS6 from a reseller in Canada. The applications activated automatically as promised, and worked fine for some months.
Then I took a subscription to Creative Cloud. I recently cancelled my subscription, preferring to go back to my purchased CS6. Now however When I try to open Photoshop CS6, or InDesign CS6, Adobe Applications Manager appears, demanding that I renew my Creative Cloud subscription. I have tried uninstalling and reinstalling everything, using CD Cleaner, all to no avail. I have tried associating my copy of CS6 with two Adobe IDs. When I enter the serial number that came with the CD, a red box appears with the text "Please enter a valid serial number."
I tried following the advice in the video linked in your post here, to retrieve serial numbers from LWS, in hopes that there is some other serial number that I need. Alas when I get to licensing.adobe.com, I am told that I am "not recognized as an authorized user of this site."
Trying to fix this has now taken several days of my life. Please suggest what I can do. I have been unable to reach Chat Support, unfortunately.