How do I get the 5300 DTMF microphone to access the additional features I have programmed to the buttons, instead of just doing live access dialing? I have modified the opt file via hex editing and have enabled both FPP and Full Keypad Supprt, however, as soon as I press a button, the DTMF dialer begins. I am using a brand new WR805 weather resistant DTMF mic. I just picked it up because I thought the Shure 3rd party DTMF mic I had was not properly supported.