Hi Aniket!
Thank you for your purchase.
I tried to activate the plugin on our test site with your license credentials, and it was successful. (I sent you an e-mail about it to the e-mail address that you give.)
It may be a temporary problem (may be a network problem), please try the activation again.
Are you sure, that your server can connect to our server? It is necessary for the activation.
If the activation still does not work, please let us know.
Best Regards,
Peter Rath
WebshopLogic