All of the sudden (starting Thursday afternoon), 1SC's communication with my installation of aMember has stopped. I am using aMember 4. This system had been working well and relatively flawlessly for over a year now. Then on the afternoon of Oct. 31st, aMember stopped receiving purchase notifications from 1SC. 1SC's tech support says there's a problem on my end, which is their standard answer and they may be right, but here's what I know. If I look at the aMember Invoice logs up until that point, I can see 4 entries for each purchase. After that point, there are zero entries. There are also no new entries in the Errors logs. If I simply point my browser to the api notification url (http://www.mywebsite.com/amember4/payment/1shoppingcart/api), I do get entries in both the Invoice log and the Errors log, as expected. So I know the logging is working. I've gone back through the 1SC before aMember setup instructions and confirmed that I have the setting right. Has anyone else had this problem? And ideas? Thank you!