HELP ASAP, prob with connection, only have laptop for a while
 

Ok, got girl friends laptop, start up car fine, open megatune it says, " the selected communication port (COM2) could not be opened, To fix this click communications -> settings and change port then file offline to connect to your ecu" Then it says go offline until you select a valid port "yes" or "no" what do i do!!! Do i need internet connection? Or do i have to get another laptop??:vash: