Hi,
there are some limitations with embedding FPM. The problem is that FPM navigates dynamically into the UIBBs, but if the FPM_START event is raised (in OVP comp controller method BEFORE_NAVIGATION) in or after the Web Dynpro navigation phase, FPM's dynamic navigation cannot happen anymore, and hence you only see the static part: the page header view. It may help to navigate into FPM invisibly in some roundtrip before, and then set the visibility to "visible" when necessary.
Regards, Jens