|Please explain what you mean exactly when you say they "do not work".|
Also, which web browser they do not work on (IE or Firefox, or both).
If IE, try this:
*Go to Tools, Internet Options.
*Click the "Content" Tab
*Click the "AutoComplete" button
*Under "Use autocomplete for" uncheck the box that says "Forms" and click OK in both the boxes.
Now close and re-open IE.