Network computers stopped showing up under "Shared" in Finder

[KappyB]

So my problem is, when I used my computer the first times I found my server I have in my house, but now after some days it's strangely disappeared for some reason.

I have no idea of what's happened or what to do, so I'm turning myself here to MR to see if anyone's got a clue of what to do?

I can reach it via SMB etc, but I don't really see that as a proper solution as it was easily reached in finder earlier.