|You don't give a lot of detail. Some would have been nice. Like, what type of connection we're talking about here (ie: wired as vs wireless).|
Best guess, without knowing whether you're connecting the client with a cable, or wirelessly is the NIC (network interface) on the client. Check to ensure it's set to get it's TCP/IP settings automatically (from DHCP). If it wasn't, make it so and try to connect again and report back here.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.