I would download and run IEFIX from http://windowsxp.mvps.org/IEFIX.htm. This is one of the problems it fixes.
If that doesn't help it might be time to visit the Yahoo help pages or contact their customer support.
I have Windows 98 and have a Yahoo account. I have been trying to add content to my home page for some time. I can get to the Yahoo Add Content page but when I click on any of the choices to choose from, the next page appears blank but in the corner it says Done. The same goes for if I type a subject in the Search box. What is going on? How do I fix this so I can look at the page?