Authorize.net is charging the card but subscription is not in Membership Pro

When one of my customers buys a subscription, their credit card is being charged the correct amount but the subscription is not appearing in Membership Pro subscribers/subscriptions. Any ideas why this is happening? I'm using the default Authorize.Net plugin that comes with Membership Pro.
Thanks.

Hi dean

Is it the first time users sign up? Or it's recurring subscription (For example, people sign up last month and today, Authorize.net charge him second payment....) ?

Did you also setup slient post URL as mentioned in our documentation membershipprodoc.joomservices.com/basic-...lugins#authorize-net ? It's very important for Membership Pro to work

Regards,

Tuan