I couldn't access the above address. I suspect the correct address is
http://chemicalinjury.net
One of the things that might be affecting the printing is in the head of the document--
This is a poor conditional comment construction and could be throwing all MS programs into a tizzy. And since there is NOTHING within the conditional, I'm sure you can just erase the whole thing.
One thing that MIGHT work is to set a width of 780px on the main wrapping tables, and adjust the interior area widths from there. Then try printing.