Okay, now things are getting clearer.
Your Ethernet and Airport connections are set to a totally different IP subnet to the printer and this is your problem. You can see that the Mac is using a subnet of 192.168.1 (this is determined by the subnet mask) and your Ethernet port has a network address of 36 and your Airport has a network address of 63. It also shows that your router has a network address of 1 for the same IP subnet.
So in order for you to be able to connect to the LJ4000N you are going to have to change its IP address from 10.0.1.96 to 192.168.1.x, where x is not 36, 63 or 1 (or another number that any other network device is using). You should also change its gateway address to 192.168.1.1.
Just one more question. Why are you using Ethernet and Airport at the same time. This is not necessary, especially if you are connecting both ports to your router. But if you have the Ethernet connecting to some network device other than the router, such as directly to the printer for example, then having it set to the same IP subnet can cause trouble for the Mac.