I have answered my own question thanks. I had not placed the tick in the TX box on the setup in "Log40M comms manager". Simple answer is , check all again and again before shouting !!!!
I'm new to the forum but not Log40M. I have Log40M linked to my TS-590S and all is working fine and I can link FLdigi direct to the 590S and transmit with no problem, such as PSK-31 and the PTT works fine on the TS-590S. When I link the three together FLdigi works fine in handing over the Log ...