First, let me thank Freddie, the author of HotKeyNet, for his support, and even more for its program. I tried several softwares when I started multiboxing, but I found HKN to be the best for me, it is very easy to configure and use, and yet so flexible and powerful. If my game experience has been so good until now, I owe it greatly to HKN.

Besides, I really don't know if the program itself is the origin of my problem : I tried to follow the suggestions stated on Freddie's site about the composition of the script, to avoid problems with Blizzard's TOS, and I'm relieved to hear from the users of this forum that my script should be ok. It could be something else on my PC : I'm running a third antivirus scan right now.

On Monday I will try to contact the billing support directly (I understand they are closed during the weekend), and to send a reminder by email, if nothing happens. I will post the results.

In the meantime, thanks to everyone for the hints and the help.