You can try a network scanner to see if the drive is on the same subnet as your computer. One that I like to use is SoftPerfect's Network Scanner ( http://www.softperfect.com/products/networkscanner/). It's free. It's small. It doesn't install anything. You just download the EXE and run it. The download link is on the right, under Product Info.
Once you download it, do these steps:
1) Run it
2) Go to the menu item Options -> IP Address -> Detect Local IP Range or click the Auto Detect IP Range toolbar button (to the left of the Help icon, it's a box that says "IP")
3) You'll see a pop up that says "Auto Detect"
4) Choose your IP address. Do not choose the 0.0.0.0 or 127.0.0.1 options.
5) Click OK
6) Click the "Start Scanning" button at the top
7) Wait for it to finish
You should see your device show up on the list. You can access it by IP address once you see it. It will probably show up with a name like "static-host.home" or something. There should be a plus sign next to it. Clicking on it will show the shares. Right-clicking a share gives you some options, including mapping a drive.
If you right-click on the IP address, you can pick Open Computer - > As Web (HTTP) to get to the config pages.
This program isn't as simple as the Discovery utility, but it sometimes finds the device when Discovery can't (it uses a different method of scanning). If the network scanner doesn't see it, then it's not showing up on your network, and you'll need to do more troubleshooting.