Menu on iPhone doesn't work with static frontpage

Hi again The Menu doesn't work on my Iphone: When I chose Appearance > Customize > static frontpage (I have danish menu - don't know if this is the exactly menu names) I can choose "Frontpage show: a static page". I choose this page "Om ecocom.dk" as fontpage. That means my frontpage is a sub-page "om ecoocm.dk": the one you see when visiting the site: http://www.ecocom.dk But then the menu doesn't work. If I don't choose the sub-page "om ecocom.dk" - or any sub-page - as a frontpage, the menu works fine. Regards Step