Windows 7 client cannot access Server 5

I am running Server 5 and have 4 clients running Windows 7 Professional. The issue is with just one of the clients. When trying to access the share points, windows barks back saying that "Windows cannot access....". I know that the issue is with the client because it cannot access any of the other clients on the network. Any suggestions would be greatly appreciated. Is there another way for the misbehaving client to access the server? Is AFP an option?