Digital BW, The Print

Paul,
in a hurry (have to go to work soon):
just installed Mis Variable Mix on an Epson 1290 (!) using your 
1280 curves. Prints are absolut muddy, heavy posterization.
Installing, nozzles, adjustment - everything fine.
Any comments?

Killed my 1270, 1290 is the follower in Germany, 1280 not 
available.

Thanks, Bernd