I've never gotten that error before, but here's a few steps you can try:
1) Try Mozilla Firefox
(link) and see if the same error(s) occur there. If they don't, then I'd suggest using that browser, since 4 out of 5 cyber-geeks agree that it's the better browser.
2) Try clearing your cache and cookies. In Internet Explorer, go to Tools > Internet Options > Delete Cookies / Delete Files. Then try it again and see if it works.
I hope one of these will offer a solution.