Recently i started working on the Payment Gateway( further spelled as 'PG') process for my site. And for the process we have to send the Post data by form to PG server by redirecting to there page and by response from the PG about the Transaction they are sending POST data by redirecting the URL to our server page, the problem arises here, as my server unable to retrieve the POST Data sent from PG server.

As i am coding in PHP, i tried to print all the response coming from PG by print_r($_POST); and even tried with print_r($_REQUEST);. I didn't found any data printing except the PHPSESSID and some other data array.

As for the confirmation I checked wether they sending the Data or not by the IE addon as "TamperIE" where it is showing the all the POST Data sending from there server. But it is not at all coming to our server. And I tried this process on some other Server, there i able to get the POST response but not with currently working server.

So please can you suggest me what might be the problem. Thanks!