Inicial page

Hi

I´ve got an inicial page of a portal that I can´t see (blank page) when inserted in the portal but when displayed in a new window it is visible...

1)If I open the Page in Content Administration, the content is visible.

2)If I place it in the portal, the content of this is a blank page, nothing appears.

3)Another curious fact is that if in this same page I click in Options->Open in New Window, the Content appears.

I´ve checked the permitions and it it all ok.

Does anybody know a solution?

Lai