IPN Sandbox updating DB but Live not!

[dabdoub]

Hello everyone.

I have a payment using IPN in my website it was working perfectly, suddenly the Database updating not working now.

The payment complete normally but i need to update DB record to activate membership.

If i tried the payment using Sandbox it works 100% and updating the record in DB but when i switch it to Live it stops updating Database.

Any Idea why?

Thanks