Thank you guys,
it's really pretty strange.
I'm sure my laptop wireless device is working fine once I can connect normally in my home (using wireless).I do use the cable in some hotels that offer high speed connections in the rooms (actually, the majority of the hotels).It works perfectely under these conditions.
This wireless problem really drive me nuts sometimes
Anyway, next time that I have a wireless connection available away from home, I'll try to highlight the name of the server to see if it works.
I'll keep you all informed.
Thank you guys!!!!