Visio 2003 Pro Prints to light to use on MFC8300

I'm new to Visio - I created my first drawing (building
plan) and went to print on my Brother MFC 8300 3in1-
laser. It prints so light it's unusable. Tried
numerious settings on printer, none of which changed
anything! Copied/Pasted drawing into Word 2003 and saved
as webpage, and tried to print with same results. I'm
using default Windows XP Pro Brother 8600/9650 driver. No
drivers posted on Brother site, they say MS defalt ones
are up to date. Have applied all Office Updates and
Windows XP updates. Am I simply missing some setup or is
there a conflict with this printer! Do not have any
problems printing any other pictures/clipart/etc... from
all other applications!

Any advice appreciated!