[amsat-bb] satpc32 port problem

Hi folks, i reloaded my Satpc32 program and did all the setup for radio and rotor etc( I use LVB tracker). Now when I start the satellite program I get a message saying “could not open Port 3) I checked the port and it says device working properly. Anyone know what I may be doing wrong?. Tnx in advance. 73 de Scott VE6ITV