I have Word 2000, and Windows 2000, and none of the other suggestions worked for me either. So I resorted to hitting the help files. I copied this out of the Word 2000 Help file:
"I can't rotate a graphic.
Only drawing objects can be flipped or rotated. If you can convert an object to a drawing object by ungrouping it and then grouping it again, you can flip or rotate it. You won't be able to convert a bitmap to a drawing object.
To convert an object, select it, click Ungroup on the Draw menu, and then click Group.
If you can't convert the object, open it in another drawing program, rotate it there, and then save it. When you reopen it in Word, it appears rotated."
I tried the last option, copied into Paint, rotated and repasted into Word, and it works. I didn't even resave it, just copy paste. Give it a try.
Sawedoff