Moniter Font Size Too Small

I now have Windows XP Pro and the fonts size is so small I can hardly read it. I went into the control panel>display>settings>advanced and the size was set to normal size (96 DPI). This is the size on my computer with windows 98 and the size is fine. I changed the setting to Large Size (124 DPI) ant the font size was better but when I open some programs I cannot see the whole window even when it is at maximum size.
Some of the programs it affects are Paper Port, CD Labeling Programs, even AOL. When I scroll to the very bottom or to the right I still don't see the whole window and therefore cannot access some of the buttons & controls. When I use the small font I can see everything but I practically have to use a magnifying glass to read the fonts.

Any help would be greatly appreciated!! You guys have helped me many times before.

 

Thanks Pete
It was the screen resolution.