Authorize Relay Response URL

Hi All,

I have integrated Authorize ARB for my project. I want to update my DB whenever automated Subscription Payment is successful. For this I have setup a Relay Response URL and Silent Post URL. But both the above URLs are not getting called by Authorize , even if transaction is successful. I am getting payment success emails , but Relay Response URL is not called.

Please let me know , if anybody has worked with Relay Response URL earlier.

Thanks,