Update:
After monitoring my website and PayPal network activity, I realized I got error 500 from PayPal.
(My IP Address is here) - - [26/Feb/2013:14:22:18 +0200] "GET /index.php?option=com_comprofiler&task=pluginclass&plugin=cbpaidsubscriptions&cbpgacctno=1&cbppdtback=4abfe8b2330b40f2910ed368564d5eb4&cbpbasket=46&result=notify&cbpid=cbp512ca8240349a707434718&format=raw HTTP/1.1"
500 189 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.97 Safari/537.22"
(My IP Address is here) - - [26/Feb/2013:14:42:04 +0200] "GET /index.php?option=com_comprofiler&task=pluginclass&plugin=cbpaidsubscriptions&cbpgacctno=1&cbppdtback=4abfe8b2330b40f2910ed368564d5eb4&cbpbasket=46&result=notify&cbpid=cbp512ca8240349a707434718&format=raw HTTP/1.1"
500 189 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.97 Safari/537.22"
(My IP Address is here) - - [26/Feb/2013:15:03:54 +0200] "GET /index.php?option=com_comprofiler&task=pluginclass&plugin=cbpaidsubscriptions&cbpgacctno=1&cbppdtback=4abfe8b2330b40f2910ed368564d5eb4&cbpbasket=47&result=notify&cbpid=cbp512cb1be0090a927448158&format=raw HTTP/1.1"
500 189 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0"
Again, you do not have the gateway or your PayPal account configured correctly. This is not something we can do for you as it'd compromise your PayPal account.
I started again, using a fresh PayPal Sandbox configuration.
I already made my first Sandbox purchase, and - same result - with one important change:
No more "Error 500" (I got 200 - OK), and a
Thank You Message appears for the first time on my site!
Also On
Paid Subscriptions > Payments there are now PAYMENTS on the list - Sand box - but still, payments.
Payments are showing all the details, includes
Txn id, Item number, Payment basket etc.
Status is PENDING.
It looks great with Sandbox, However:
1. The CBSubs system keeps blocking the user from accessing that plan.
2. The user is having a "Waiting Payment" for that plan on his account.
(Maybe now it is because of "PENDING" status?)
The most "Amazing" part - still happens, where the PAYING USER is logging in and being AUTOMATICALLY REDIRECTED to PayPal (sandbox...) to complete The Same Payment again.
So,
We are getting closer - but only with Sandbox Paypal.
Please review the documentation carefully and review the instructions within the PayPal Gateway.
I assure you I did.
Take the configuration slowly and read every word as messing up the configuration means a non-working gateway.
Triple checked everything, on 2 different days...
I feel that the process is logical and simple, but still - something about the "Live" Paypal is not working as expected.
Are the "Clues" on this post give you some ideas on how to solve it?
Thank you so much - Your support is truly amazing.
I hope we will get to the solution of it.