QTR-Quadtone RIP

I don't know if this has been covered but I have a strange thing 
happening.

I have an image that I put a stroke (3 pixel) all around and when I 
print it on my 4000 from QTR on Mac os 10, The right hand stroke, that 
is the last one as the image comes out of the printer doesn't print.  
It looks as though I only put a stroke around the top, bottom and left 
hand side.

I haven't tried printing this without qtr involved so I don't know if 
there is a strange file problem but what is really wierd to me is that 
I have 5 other images made at the same time with the same number of 
layers (actually the exact adjustment layers) that print with all 4 
edges of the outside stroke present.

Any ideas?

Randy