Raster PDF Problems

Ok,

I am having a problem with a Microstation V8 XM file that containes both vector and 2 rasters, I am trying to create a pdf file then print a multi page pdf, but when I print the pdf that looks perfect the raster files are blacked out on a large format kip plotter, it prints fine on smaller 11 x 17 HP laser printer.  Can someone HELP we have been beating our heads trying to figure out this one out? 

 Thanks,

Rynda