No, all you need is your main site url in the IPN settings. Also did you check your logs like I asked?

still nothing , by the way I need to tell you that I'm using this system in my forum
http://www.vbulletin.org/forum/showt...t=point+system
and it's working with paypal , people can actually buy coins using their paypal , so the forum does get paypal requests even without setting this IPN thing , so I really don't know why it's only the subscriptions that are No more working , it has been working fine with HTTP , and the point system was working with HTTP and still working with HTTPS , so what is the problem :( ?

Did you check your http access logs? Its really important.

I looked at the code a little more and I believe that error message comes from paypal_gateway.php, which means you must be getting the IPN from paypal. When the IPN is received, the script connects to paypal and sends it back to verify it, and if that fails for some reason, you get authentification_failure. Unfortunately there isn't a lot more information. One thing it checks is the email address that you have when you set up paypal as a payment method, but since it was working before you went to https, unless you changed it, that's probably not it.

Any way to set up something like a .htaccess to allow access to just the payment_gateway.php via http? I'm not a server admin person so I don't know how hard that would be.

Edit: oh, actually, now that I think about it a little more, if you only have a few of those it could just be someone other than paypal accessing that script (I think I did it myself at least a couple of times). So maybe you still need to be looking at whether or not paypal is connecting to your server.

I asked this in post #18 and no answer yet.

Unless I missed the info in the posts somewhere.

Yes, I realize that. You've actually said it twice (well, three times now) and Zachery once. That's why I said still need to be looking....

I've been trying to look where to find the server logs , since I haven't setup error handler on the vbulletin option , and when I open my website using FTP I can't find the logs file which I always find in the root directory for my other websites (not vbulletin). So it will be great if you can tell me where to find that , and I've shown you some pictures for the paypal fails so I guess the server is not accepting paypal to log (just for buying subscription) , how to solve that !?

That is something you would have to ask your host where those logs are.

ok I'm contacting the hosting support , but let say I've checked the logs and found what you told me , so what is the solution for that !? so we can try it ?

Yeah you may not find your logs via FTP, most hosts do not have them placed there were they can easily be downloaded. You can usually view them in cPanel if you have that or possibly Plesk although I do not remember at the moment. Your host will know exactly where you should view them. Its usually not something that you have to have installed, usually with most hosts its already there but it may depend on your web host.