IPN Variables not returned

Hi I have a site in which paypal ipn is implemented with cart.. the Payment is working fine. But after payment iam updating my database with the return value which is getting from POST from paypal but now iam getting this POST arra开发者_如何学Pythony as null Any one have the idea? please help me

Thanks in advance

Paypal now does not return parameters in the POST, they send those parameters via IPNHanlder.

IPNHandler is a background call which paypal makes to your site, and sends all the required POST parameters through IPNHandler. I had the same issue few weeks ago, but then I changed my logic and started using paramters from IPNHandler.e