Wireless to wired connection via router...

Hello everyone!

I have the following extremely irritating problem: I have a home network with 3 PC's and a wireless router. Two of the computers are connected to the router wirelessly, and the third - via wire. Everything is OK with the internet connection on all computers. The problem is I cannot make the wireless connected computers see the third computer over the network and thus have File and printer sharing. It is important, because my printers are connected to the "wired" computer and I need to have access to it via the network to be able to print.

All three computers are on the same workgroup, the two with wireless cards see eachother and communicate, but neither of them is able to see the wired PC!
however, when I a ping of the wired computer is possible, but it cannot be seen in Network Neighbourhood.

What can be the problem? It really drives me nuts!

it would be really nice of you give us some information, like, brand, model of your AP, and how are you setting up the network.

Some ap's have a security option where wireless clients can be restricted to access only the internet but not the wired clients. Other routers consider the wireless clients as in the DMZ zone.

The Router is a very common D-Link DI-524. Nothing unusual in setting up the network - all the PC's taking up IP's, etc. by DHCP, Internet connection is working on all computers. The two wireless computers can see eachother and communicate, but neither of them can see the wired one, although a ping is possible. The wired computer does not appear in Network Neighborhood.

I guess, because the router is giving the setting of all the PC's automatically, the problem is not because of wrong subnet or IP of the wired computer - all PC's are of the same network.