Datacolor User to User Support Group.

When describing your problems with prints not matching your monitor, 
you do not mention what software you are using to manipulate your 
images and whether or not you are "soft proofing" the images using it 
against the printer profile.  I have two printers with totally 
different characteristics and have to modify the images for each one 
to get a good print.  I use Photoshop CS3 and I use the soft proof 
feature to see how the print will look on the specific printer and 
then make adjustments to brigthness, contrast, color balance, etc. to 
get the best image possible.

Since someone else is doing the printing, I am assuming they are not 
double color managing the image which, classically, produces darker, 
color shifted images.  This would occur with software like Photoshop 
where you let PS and the printer both apply color management to the 
image - one or the other, but not both.

In short, there are multiple points in the image to print process 
where things can go wrong so it would help if you could describe the 
full process you are using.

Thanks,
Rollin