Digital BW, The Print

I have recently run into problems printing with the K7 piezo inks on my 2200. I have run 
through a couple sets of carts already and tonight my 2200 is being very stuborn and 
when I send a print through the Quadtone rip to my printer it acts as if is print but actually 
no ink is applied. I don't get it. It started out only happening with 13x19 paper size but 
now occurs all the time. I've tryed restarts, shutdowns, plug-in,plug-out, reinstalling 
printer, quiting PSCS2. If anyone has a solution or idea let me know.

Much thanks,

John Ladwig