Fatal error: Session variable cart_PayPal_IPN_ID is not globally defined

[twigster]

Hello All

 

I am trying to install the paypal ipn module on my site but am having problems. When I go through the checkout process I select the paypal ipn module and click next. When reaching the checkout_confirmation.php I am getting the message

 

Fatal error: Session variable cart_PayPal_IPN_ID is not globally defined

 

I have register globals switched off but am unsure of how to cure this problem.

 

Any help would be muchly appreciated.

 

Thanks