Login to your StromPay account, In your Profile, IPN Configuration, set these two options:
Secret Code - set a secret code that StormPay will pass in ALL IPN POSTs to your server-side script. Secret Code (6 to 12 chars)
IPN Secret Code Variable Name - you may also supply the NAME of the IPN variable that StormPay must use to send the Secret Code value (if specified above) to your server-side script.
Now, login to your Auctionawy, or Classifiedawy, or Searchawy admin.cgi center, click on Billing Manager -> Payment Processor Setup, then click on "StormPay", then Enter your StromPay account email address and the two variables above "Secret Code" and "IPN Secret Code Variable Name" exactlly as you set in your StromPay account IPN Configuration.