activation key problem

when tried to send activation key, received mesage:

A problem has occured when contacting the licesing server:
The underlying connection was closed: An unexpecting error occured on a send

What can I do ?

Hi Beovez,

What OS are you using on your machine? 

It might be also a problem of your Antivirus software that is blocking the access to our licensing server. Please try shutting it off and reconnecting.


Hi Russel
I still use Windows XP
no antivirus software in PC


I’m sorry to inform you that Windows XP is no more supported by eM Client. You can read more about it in this post:…


Thank you for fast replay and help

It is final time for reinstallation OS