I've trouble with paypal and alertpay ipn publish data.

My Webhost particulars are:

  • OS: Linux
  • Webhost: THEPLANET.COM
  • Webserver: Apache 1.3.41(Unix)
  • cPanel: 11.24.4-RELEASE 32603
  • PHP: 5.2.8

The issue is whenever paypal and alertpay posts data to my ipn url, my server returns error(500) internal server error. But when i open this url during my browser it really works ok and haven't any problem. My server return this error simply to PP and AP. Trying for lengthy to turn to fix this issue but tend to not find. My log file do not have anything to related this error.

So please let me know what configurations on my small server leading to this error. I've examined on another servers where every factor works ok. Can there be in whatever way to check two servers to discover the reason why? Or things i request to my admin to repair this issue?

What flavour IPN script are you currently using in your server? custom, an ecommerce package etc?