URL server/?_task=settings&_action=preferences gets http error 404

[MikeAspinall]

W2K3/IIS6/PHP 5.3.8/MySQL 5.5/Roundcube 0.6/hMailServer 5.3.3

Personal Settings top level tabs
Personal settings / Folders gets 404 error (http://172.16.1.92/?_task=settings&_action=folders)
Personal settings / Preferences gets 404 error (http://172.16.1.92/?_task=settings&_action=preferences)
Personal settings / identities is OK (http://172.16.1.92/?_task=settings&_action=identities)

All of the individual section (left hand navigator) are all ok

Any help/advice gratefully received

[MikeAspinall]

Solved

I added ASP in IIS web service extensions