Paid Subscriptions Not Auto Processing
 

I am at a loss to figure out what is happening on my paid subscriptions. They all process through PayPal without any issue. However, I go for stretches where it does not automatically update the persons membership. I normally get two email notices. One from PayPal and one from vBulletin advising me that a new subscription has been added. But for the last little while I have not been getting the vb notices. Therefore I need to go in and manully add the subscription to the members profile.

Anyone know why the vb portion works sometimes and not all the time?