When registering Farm Commander, your domain name must match.

The best way to see what domain name Farm Commander found is to check:

-Start Farm Commander, Options, License and press 'Get License'. The Domain Name field gets filled.

Many people register with the domain name: nwtraders, while Farm Commander detects; nwtraders.local

This is why it's better to register Farm Commander from within the application itself. This will prevent errors.