Digital BW, The Print

Hi all !

I'm converting my 7500 to MIS UT-FSN+, Paul's new inkset...
I've done two prints, both with obvious noozle problems... but
encouraging. 
After many attempts with normal cleaning, I tried loading the lines
again in maintenance mode... 3 times actually...
Now my carts are almost empty, and I still can't get a good check for
the yellow ink... 10 noozles are not firing (yesterday, it was at
50%!). The other colors are OK.

I used the transportation procedure to empty the color inks (Epson's
ColorFast) before installing the MIS carts...
When I first loaded the lines, I saw clearly air bubbles in the yellow
ink line... But now almost 100ml of ink has gone through it, I think
it should be ok !!!! and I can't see bubbles anymore...

What am I missing ? I didn't try KK1 or KK2, just KK0 cleaning and ink
charging... and my carts do not contain air... I checked this morning,
before yet another ink charge...

I'm really stuck ! I must add that the printer worked perfectly in
color...

If some of you have had the same kind of problem, please HELP ME !

Thanks !
Chris

PS : I'm afraid I'll have to order new ink bottles... it took me 2
days (the printer had much rest !) to empty the carts :-(
PPS : I'll copy this message to MIS support...