I recently purchased a used 6500 that was never upgraded to V2. I have purchased V2, upgraded the radio and am trying to use Smartlink. I established my account and have read the Smartlink instructions. When I bring up the window and login, it asks that I key the radio to confirm that I am next to the radio. But none of the PTT options will key the radio into TX mode, so I cannot register. Radio works just fine with the SmartSDR software, but I need Smartlink to work. The display says "remote". How can I key the radio to activate Smartlink?