if you want to conecting your note book with a wireless conection some times you need to deactivate your fire wall... this is a few tips for deactivated firewall on windows vista

1. Start | Run | Services.msc (alternatively: Control Panel | Administrative Tools | Services Management)
2. Find the entry “Windows Firewall” | Right-Click it -> Properties
3. Press “Stop”
4. Change “Startup type” to “Disabled”
5. Press OK and exit.