WINSOCK Error: Host is unreachable.
A socket operation was attempted to an unreachable target host. WinSock generates WSAENETUNREACH when it receives a "host unreachable" ICMP message from a router instead of WSAEHOSTUNREACH. The ICMP message means that the router cannot forward the IP datagram to the target host, possibly because it did not get a response to the ARP request (which might mean the destination host is down).
Try to ping the destination host, to see if you get the same results (chances are, you will). Check the destination address. Check whether you have a router configured in your network system (your WinSock implementation). Use the tracert command at the command prompt to try to determine where the failure occurs along the route between your host and the destination host.