1. Log in
http://finance.yahoo.com/ and tick "keep me signed".
2.For allowing cookies, follow following instructions
Internet Explorer 6.0
Select Tools from the taskbar at the top of the browser screen
From the drop-down menu choose Internet Options.
Click on the Privacy tab.
Click on the Advanced button.
Click on Override Automatic Cookie Handling.
Click on prompt under First-Pary and Third Party Cookies.
Click on OK and then OK again
Regards