Unusual IE behavior

[EdP]

A friend is experiencing unusual behavior with IE6 running under Win XP Home SP2. She has a retail web site which includes some secure pages that report details of her business. To get to the menu for these pages, she:
Navigates to www.hersite.com/fm/menu.cfm - the login/password screen appears
Logs in - the menu appears
Clicks a menu item, eg, Upload Transactions (ut.cfm) - instead of the correct screen appearing, the login/password screen reappears but the path to the correct screen shows in the address bar: www.hersite.com/fm/ut.cfm
Logs in again and the Upload Transactions screen finally appears.

Neither her webmaster nor I can duplicate this behavior using IE6 on our PCs.
This does not happen when she uses Firefox.

Here's what I've done
- updated and run NAV and three different spyware detectors all of which report that her PC is clean.
- uninstalled unnecessary applications (from when her kids used the PC)
- reset services using Black Viper's "SAFE" recommendations
- disabled all unnecessary applications that start at boot time

Can anyone shed some light on this or suggest something else to try?

Thanks
EdP

[EzyStvy]

In IE try going to Tools->Options->Advanced tab->UNcheck "Enable Intergrated Windows Authentication"

[EdP]

Thanks, Ezy ...

She just tried your suggestion, but the problem remains.

EdP