Error after clicking update button to proceed

[Peper]

Got small error

 

it calls for checkout.php once update button is clicked to proceed then getting this

 

Fatal error: Call to a member function pre_confirmation_check() on a non-object in /home/rojec/public_html/shop/includes/classes/onepage_checkout.php on line 616

 

 

Now line 616 is: $GLOBALS[$_SESSION['payment']]->pre_confirmation_check();

Line 617 is: $GLOBALS[$_SESSION['payment']]->confirmation();

 

I'm using a payment module called Setcom (South Africa) and not Paypal

Even if not selected, getting same error

 

Any help Please!