Digital BW, The Print

I tried a sample package of Innova Fibaprint Ultrasmooth Glossy on my
C86 with the MIS EZ-warm inkset (and photo black).

The result was as bad as anything I've seen. The print was solarized,
if that's the right term. There is coarse detail and tones, but little
or no fine detail. Highlights are blown - paper white. Gloss
differential is pretty bad, although I suppose it could be fixed with
overspray.

Normally I print Silver Rag with this setup and the results are
beautiful - great prints without having to tweak the controls at all.
So I don't think there is anything wrong with the printer or inkset. 

I only have three sheets left and don't even know where to start to
fix this. I really like the finish of the Innova paper and had high
hopes for it. Can it be salvaged? Has anyone used this combination
successfully?