I cannot log in with Internet Explorer but I can do so using Firefox.
It is a mystery to me!

Try clearing your cookies in Firefox and try again

Try the following

1. Open internet explorer
2. Click on the top tool bar Tools
3. Click on Internet Options
4. Click on Delete Cookies.

If that does not work. Try the following

Repeat Steps 1-3
Then click on the tab that says Advanced and select Restore Defaults. This will reset any settings and give you the option to reset your home page

Regards,
J J
Microsoft, Linux, Comptia Hardware, Cisco Certified Engineer