Powerpoint presentation within Powerpoint presentation - does not work

[Bernhard]

Hi,

I´m trying to create a ppt menue for a touchscreen. On the
left side of my ppt-menu-slide there are the buttons with
the different presentations (which are all already
existing and can not be changed). On the larger right side
of the slice the presentations (linked in the menu) shall
appear.
However, if I embed these prensentations
(insert/object/ppt-presentations) they will only show the
first slide. if i press left mouse button on the embedded
ppt-object the main presentation (with the menu) will go
the next page (not the embedded presentation, which i like
to do).

Does anyone know a solution?

Thank you very much!

Bernhard