I recently purchased a Win 7 Acer netbook. It is a wireless connection. When connected to my home network it repeatably loses connection. It apparently impacts the router somehow causing a Vista (wireless} and XP (Lan) to lose connection also. When the Acer is not turned on all is normal. Microsoft claims the D-Link 1310 is compatible.
Have you tried restarting your router? Since Microsoft says that the device is compatible with Windows 7, it could be a number of things, including a problem with the hardware, but there's an old trick with Windows that might help you out:
1. Go to Device Manager
2. Find your ethernet network adapter, then right-click on it. Select the option "Uninstall".
3. After trying the steps above, your network card is listed as unknown device. Restart Windows, it will recognize your network card as a new device and do an install of the driver.