Having problems with associating A+ content to the ASIN.

In the A+ content manager, content page, when search to add ASIN, ASIN comes as 'not eligible'

and the reason comes as 'You are unable to add content to this ASIN because our system does not recognize this ASIN as part of your brand.'

which i cannot understand.

in the product listing page the brand name and the brand name in the brand management page matches.

Product Listing Screenshot:

Brand Management Screenshots:

Any guidance & help to solve this issue is much appreciated.