There may be an issue with the saved wireless profile. You can remove the profile and reconnect to the wireless network and see if it keeps the settings.
*Removing a Wireless Profile*
- Move the mouse to the right edge to access the charms menu
- Click on Settings
- Click 'Change PC Settings'
- Click on Network
- Connections > 'Manage known networks'
- Select your network and select forget
Reconnect to your network again and hopefully it will keep the settings.