So, I tried that now it won't even print the black undercoat. I've flushed and cleaned everything that I could. It's printing the design perfectly just not the white undercoat and now since I changed the RIP configuration no black undercoat either.
I am having the same issue. I have the ET-8550 and the configuration I have is the KWCYMW but it is printing black as the background instead of white. It's frustrating!