WDPortalNavigation, opening new page in FULL_PAGE mode

Hi There,

I am using the WDPortalNavigation.navigateAbsolute method to open a new external page in my portal. Technically everything seems to works fine except that the new window is NOT opened in FULL_PAGE mode. It always pops up in a small window and I always have to maximize it.

I call the method in my Web Dynpro:

WDPortalNavigation.navigateAbsolute(

"ROLES://<my portal page>",

WDPortalNavigationMode.SHOW_EXTERNAL_PORTAL,

"",

"",

WDPortalNavigationHistoryMode.NO_HISTORY,

"",

"",

wdContext.currentContextElement().getUrl());

<my portal page> has as attributes Height_type = "FULL_PAGE" , Launch in New Window = "Display in Seperate window"

Has anyone a hint about what i am doing wrong?

Thanks

Bertil