I am trying to communicate with a rosemount 3095mfc flow transmitter. I have tried the rosemount engineering software with the hart modem, a 375, and a 275 and none of them will communicate with it. I have tried putting the 250 ohm resister every possible way that it is possible! I just cannot communicate with it for nothing. have you ever not been able to talk to a hart device because the hart comms went out? this is a brand new unit. I just dont understand what is the deal here.