Test went through successfully. I had the grace period set to 3 days, but more importantly I had reset the md5 hash, that was throwing an error before.

Seems to be working fine now. For anyone else who happens upon this thread, the Notifications and History Logs of CB Subs are very helpful for debugging.

I've tried the md5 hash reset to another code. However, I still am not able to get my subscription IPN. I first started using this plugin about 9 months ago. I have 40 subscriptions but only once have I received an IPN. Was there a specific method for the md5 hash that you used? I tried a hash that was limited to 20 characters. I also am using authorize.net Thanks for any input!

Yes, it appears that the Notification and History Logs of CB Subs is about all I have to go off of to see what is happening. However, the initial payment and setting up of the ARB is the only thing that goes successful. Strangely I have only seen one random notification showing that an IPN for authorize came through for a subscription payment down the road. I have actually had a lot of help from Nant looking into this for me but it appears we can't locate the problem. He verified my system was setup correctly and even peaked into my settings with authorize and verified that was setup as well. The last advice I got via support ticket was to try a 20 character md5 hash. Seems like shortly after that I was able to receive the random IPN for a user, Although the rest the users I have not seen anything monthly. So I manually reactive the correct plans for users as their payments come through and even have to change the recurring type back to automatic with notification in hope that the IPN can still be received. If at all they are even being sent from authorize. Authorize has been of no help in commenting about IPN's. I guess it is a feature they don't really care about. Also, my system does not have any firewall plugins. The only other extension I am using is Jfusion for syncing my Joomla uses with Magento and thats about it. I am convinced that the Authorize.net IPN callback is not that reliable. It would be interesting to know what the very best setup is. I would even changing hosting. Does the affiliated Joomapolis hosting options have a good record with Authorize.net and ARB transactions? My web hosting has not been able to comment much as to problems related in not receiving the callbacks. Maybe there are some common problems with host settings that I am unaware of that could cause this?

Has anyone sovled this issue? I have upgraded my system to CB 1.8 and CB Subs 2.0, however I am still not able to recieve IPN's from Authorize.net. Will this upgrade only fix the IPN issue on new subscriptions? I noticed this thread has been marked solved. Can someone share the solution? Thanks.

To be more productive with this I am including this thread that has been created for a potential bug regarding this issue: www.joomlapolis.com/forum/253-potential-bug-122/184354-auto-recurring-payment-issues#184354

According to the CB Subs release announcement thread, this is not an issue with version 2.0. I will report back the results with my case over the next few weeks. I am really hoping 2.0 is the ticket to get the auto expire to stop.