Windows 7: windows 7 with IE9 auto complete not working?

Basically as it says in the title.......turned on autocomplete to remember email addresses etc and its not...read various threads on other sites before i started this thread but not clued up enough and quite wary to use their methods.....any help much appreciated...cheers

AutoComplete

The AutoComplete feature in Internet Explorer lets you more quickly fill out web forms and navigate to websites you have visited in the past. AutoComplete collects and stores in the registry on your computer the data you type in web form text boxes and the Address bar. If you choose to use AutoComplete for passwords, they will be stored in encrypted form on your computer. AutoComplete information is not shared with other user accounts on your computer.
The first time you submit a web form, you will see a message box that asks if you'd like to turn the AutoComplete functionality on.

To turn AutoComplete off

1. In Internet Explorer, click the Tools button, and then click Internet Options.
2. On the Content tab, in the AutoComplete section, click Settings.
   • In the AutoComplete Settings dialog box, clear the appropriate check boxes for the AutoComplete options you do not wish to use, and then click OK.

To clear AutoComplete history

1. To clear AutoComplete or web address history, click the General tab, and then, under Browsing History, click Delete.
2. In the Delete Browsing History dialog box, select the Form data and Passwords check boxes, and then click Delete.
   Note:To clear web address entries, you must select History, which also deletes your browsing history.
3. Click OK.