Hello Eddy,
thank you for reply.
My pc has windows XP PRO 2002 SP3, avast 11.1.2245 Virus definition 160114-0
Windows firewall has reported when the client software has started the 1st time a security exception request, acknoledge this nothing. My first think when software has fault is dammed windows firewall, but disabled nothing has changed. The tech support of welland tell me to disable also the antivirus ... (thing that I've not suspected)
The client has reported :"internal error occurred! error code 0"" and the client log (yes! has logging function!!) has, from my point of view: I'm a developer for various enviroments, nothing suspicious.
Has avast a logging or traceout function?
Thank you again Eddy