ok Larry, problem fixed. I forgot to change the default broadcast address in Wintest, so the transmission of data was OK from wtDXTelnet to Wintest, but not in the inverse direction :-) Now all is OK. Thanks. 73 de IK7JWY From: "Laurent HAAS - F6FVY" <f6fvy at free.fr> > Usually, it is a misconfiguration problem between WT and WtDxTelnet.