Discoloration When Printing on Canvas.

Hi All
I was wondering if anyone had any experience printing on canvas - I have a Canon w6400, and use Photoshop elements 5.0.
There is a slight greenish hue while printing black and white, where as when printing the same on paper, I don't have that problem.
Any insights will be appreciated.

Are you truly printing grayscale/b&w? It sounds to me as if you're printing an RGB image with the incorrect color space for your printer profile.

Check with your print service to see what color space their printer uses. Most services use "sRGB." You'll have to make sure your images are asigned that same profile. Then tell the lab not to do any color correction on your images.