[Zope] Zope/IIS and IE5

Hi all, After playing about with Zope on Linux, (works great btw), I started looking at it on NT with IIS. After struggling for a while with the permissions using IE5b I decided to try NS4.5 and lo and behold it works. In a nutshell, the authentication system doesn't work when used from IE5b, but it does work with NS4.5, obviously IE5b is at fault here. Anybody got any ideas? TIA Phil wmlph@d032.ml.uwcm.ac.uk