@ Daniele,
I'm stumped...
THe only other thing I can suggest that may help is to change the SSID name on the router to something else such as : ROADSL ; then change it to this in the easynet config also...
Reason for mentioning it is that I had an SSID with a space between tow words that worked fine with every other wireless thing in my house except for EASYNET, it baffled me for a few hours why I couldn't connect to the router but then I changed the SSID and all was fine