Digital BW, The Print

Is it possible to get a clean print using this combo? My 1280 has 
MIS Ebony black and MIS orig. archival color inks on a CIS 
system...this system works wonderfully w/other papers...in fact, the 
B/O prints (and color) are really nice on EEM and Moab entrada, but 
this Red River Aurora paper I can't get a clean sharp print...almost 
like the ink doesn't want to 'take' to the paper. This is most 
noticed when printing the Pantone Profiler-Plus callibration target, 
not to mention regular photos that print fine on the other papers. I 
really want to figure this paper out, but am stuck. Any 
ideas/suggestions much appreciated..thanks(!)

Best,
Mark