I have a Yeasu FT-991A and successfully broadcast using both JS8 and Winlink (using Vara HF). However I have recently added VarAC and cannot get a signal out. Had a more experienced buddy go through all my computer settings and they all seemed fine. He did not know my radio and could not comment on that, but thought it curious that Winlink and JS8 worked on the same radio. Any thoughts on how I might fix this? Thanks.