10.25" right margin won't change

[SY]

Product: Word 2002, SP2
Problem: The right margin is set at 10.25" (don't know how it got there).
Although the Page Setup Margins tab says the paper is "Letter" with the right
and left margins at 1.25" each.

However, when I do a print preview it looks fine.

What's up?

 

[SY]

When I try to slide the right margin to 6.5" where it should be Word jumps it
back to 10.25". Also, the orientation IS set for portrait.

 

[SY]

When I use the mouse to slide the right margin from 10.25" to 6.5" where it
should be Word jumps it back to 10.25".

Also, the orientation IS set for portrait.