using a paypal library but ipn validation is not working in codeigniter

[eluser]Rok Biderman[/eluser]
[quote author="dhananjay" date="1342948106"]when i click that return to website it return to success page but i get an alert box like this page is not secure how i can avoid this alert and how it will be automatically rediretd back to my success page after payment done on paypal.....[/quote]

If you're using Chrome, this is a normal alert when redirected to non-ssl site. It can only be removed by installing SSL certificate. Other than that what you can do is to enable auto return, like described here.