Jim, Your correct on edit the rig file. I changed my Yaesu FT-1000MP Mk V file and changed pack to rtty and works great. I use a SignaLink USB connected to packet port on rear of rig. Using MMTTY. Now with rig in packet mode it logs in rtty in DX4WIN. As I was having same problem as W0PR before this change. Happy New Year George, K5GH