What version of IE are you using? How do you connect to the internet, modem or lan? I'm not sure how the detection setting is having an effect on the problem if modem. Have you tried deleting all your internet temp files and all old cookies. If it is IE 6 you can do it through tools/internet options if not you may have to d/load a utility or manually find the folder and physically delete them. Worth a try though..Check your security settings again. Upgrade to IE6 if haven't already.