What does it say in the console on the RIP (Bottom Right)
How wide is your print?
We actually just had a similar issue with our Onyx, the panels were 52" and our media was 54, we we're able to rip the smaller panel, but the larger panel was doing something similar to your situation. We ended up just re sizing the larger panel to a smaller size, and the rip seemed to recognize it and printed both.
Hope that helps.
You need to select more than the ip address to get a printer running correctly.
I think Epsons use ESPC or something for their transfer protocol.