Maybe its your browser settings.
If your using Internet Explorer( IE8)
Try this settings:
1. Click Tools, scroll down to Internet Options then click, you are now in "General" settings, make sure that the "Delete Browsing History on Exit" is unchecked.
2. Then Click "Security" tab, set it to Default. Then go to "Privacy" tab and also set internet zone settings to default.
3. In the "CONTENT" setting, is probably where your problem is( if no third party software is tweaking it):
so, click "content" tab click the "auto complete" settings and you will see "username and password on forms" make sure it is checked. Finally click "Delete Auto Complete History" button (also in the "content" settings)
In the first check box is "PRESERVE FAVORITES WEBSITES DATA" make sure its is checked. you can read it says "KEEP COOKIES AND TEMPORARY INTERNET FILES THAT ENABLE YOUR FAVORITE WEBSITE TO RETAIN PREFERENCES AND DISPLAY FASTER"
OR.. Just install Firefox or Google Chrome ha! ha!:biggrin2: