Windows XP installed Explorer problems

Hey guys, just a quick question, I have bootcamp installed with windows XP and I am having a problem with Internet Explorer. I am able to access the internet and surf the web, but I cannot log into anything. If I try and go to yahoo mail and log in I get a HTTP 405 error that says resource not allowed. Im just wondering if any of you guys know of something that just barely needs to be tweaked so that I can get it runnng.

Thanks for the help and support, I could not have made it this far with out the help.

In Windows XP: Control Panel -> Internet Options -> Security. Make sure you have the default security levels set correctly.

BTW, you can also access your Yahoo mail from OS X.

Regards.

yea, but I have a few programs that only run on xp and can't email files right now for that program... I will check into the securtiy settings though