PayPal Pro gateway problem, Quick fix

I switched servers and the paypal pro gatway is not working. I get a loop error. I think it must be something with this command: $ppro_options[ssl_root]="https://".str_replace(":443/","",$_SERVER['HTTP_HOST']).dirname($_SERVER['PHP_SELF']).((dirname($_SERVER['PHP_SELF'])!="/")?"/":"");//is must for paypal pro direct payment When I alter the str_replace it is working but I get the wrong path...