In-laws having problems trying to connect to internet using dial-up modem. They used to be with Tiscali and only used the internet infrequently. When they tried connecting, message pops up "cannot detect modem". Have reinstalled on several occasions but still got the same message. The modem was connected to an AMR slot. I assumed the modem was at fault and bought a new PCI modem card. I created a new connection with Free 0845 6043034 and thought I'd solved the problem but the next time they used the computer Error code 603 reappeared and we are back to square one. Any idears?