unable to get paypal post pramenters in the return url

[aginza]

I have one code for passing some custom variables to PayPal and these were collected in the return page, but when trying to get these values it is not workingI have a PayPal form like this :\[code\]<form target="paypal" action="https://www.paypal.com/cgi-bin/webscr" method="post"><input type="image" src="http://stackoverflow.com/questions/14046318/submit.png" name="submit" alt="Make payments with PayPal - it's fast, free and secure!"/><input type="hidden" name="add" value="http://stackoverflow.com/questions/14046318/1"/><input type="hidden" name="custom" value="http://stackoverflow.com/questions/14046318/IP"/><input type="hidden" name="cmd" value="http://stackoverflow.com/questions/14046318/_cart"/><input type="hidden" name="business" value=""/><input type="hidden" name="item_name" value=""/><input type="hidden" name="item_number" value=""/><input type="hidden" name="amount" value=""/><input type="hidden" name="page_style" value=""/><input type="hidden" name="no_shipping" value="http://stackoverflow.com/questions/14046318/1"/><input type="hidden" name="return" value="http://stackoverflow.com/questions/14046318/index.php?action=success"/><input type="hidden" name="notify_url" value="http://stackoverflow.com/questions/14046318/index.php?action=ipn"/><input type="hidden" name="cancel_return" value=""/><input type="hidden" name="rm" value="http://stackoverflow.com/questions/14046318/2"/><input type="hidden" name="cn" value="http://stackoverflow.com/questions/14046318/Additional Information"/><input type="hidden" name="currency_code" value="http://stackoverflow.com/questions/14046318/AUD"/><input type="hidden" name="bn" value="http://stackoverflow.com/questions/14046318/PP-ShopCartBF"/></form>\[/code\]I am successfully returning to the URL after payment. and there I am just trying to print the POST Variable for now and It is not giving me any values.I have tried by both enabling and disabling 'auto return'. In both case I don't get values. Please help me, thanks in advance.