On 15/07/2012 02:50, Marco wrote: > PC will not key the rig. > Ports: 51 for LPT1, rig control 0, no rig control > PTT is ON > Caps Lock is ON Please confirm that SIDETONE is OFF I tested SD here this morning, with the same parameters, and it's working as expected. If the problem persists, please send me your SD.INI file - I will compare the parameters. 73, Paul EI5DI