Have had to replace the remote RCC due to lightning strike. New unit was V 2.66 so upgraded local unit firmware from 2.41 to 2.66. Changed Remote ports to match local ports Cmd 1200 Audio 1100 SIP 5060. Control then worked fine. However, cannot get Com1 (Expert Amp) or Com2 (CAT TS480) to work, using exactly same configuration that had previously been used before firmware upgrades. Is there a change to configuration on these ports that needs doing, or am I missing something obvious?