Nope. Just 1.
Can you hit the DASH button on the other DVR and see if it says anything about SWiM being connected?
Also, when the CCK is powered on, what lights are lit on it? The Power and Activity lights should be green.
Next, can you swap out the Ethernet cable from the CCK to the DVR with a different one?
Lastly, another way to test if the Ethernet port is bad (which I will admit is always a possibility, however, slim) on this receiver would be to connect the CCK to your other DVR. If you do that, disconnect the Ethernet cable from that DVR and reset the Network Settings. Then power up the CCK and connect the Ethernet cable from the CCK to the other DVR. You should get an on-screen prompt that a wireless adapter has been detected.