Glance works fine over a healthy wireless network.
However, your connection can become unreliable if the wireless signal is weak or if there is interference from a nearby 2.4 GHz device, like a cordless telephone or a microwave oven. This could cause a Glance session to hesitate or drop unexpectedly. Use a wired connection whenever possible.
Also, try disabling your computer’s wireless network interface when it’s not in use. Some Windows laptops have a silly policy of latching onto any wireless network that pops up, dropping existing connections on your wired interface. To prevent this, click Start > Control Panel > Network Connections. Right-click the Wireless Network Connection and choose Disable.