Digital BW, The Print

I have just installed MIS UT2 in an Epson 890.Not very impressed with 
the midtone rendering.All the midtones appear to be compressed into one 
shade of gray resulting in a mushy print.I have followed Paul Roark's 
workflow to the letter but to no avail.Even the BO print I am using as 
a standard to achieve is much superior.HELP.Any advice is much 
appreciated.Pete.