Internet explorer 5

I have a computer that can browse every web site there is except when I try to check my MSN website. It is giving me the message
‘Your Web browser options are currently set to disable cookies. To use .NET Passport, you must enable cookies’
Yet inmy internet options my cookies are infact enabled. I tried them on the lowest level and the highest security setting. in all zones. I also installed internet explorer 5.5 service pack 2 and when that did not work i tried IE6.0 service pack 1. Still nothing. I also install all of the latest updates and service packs and still I have not had any luck. Even checked the bios time and some registry setting. Can someone please help.