Word XP: Not possible to assign the Insert-Key as shortcut for amacro

[Reinhart Vollmer]

Hi,

I try to assign the Insert-key to a macro, but it is not accepted by
Word XP. I can choose Alt+Insert, Ctrl+Insert, but not the Insert-key
alone. The same happens with Alt+D, which is not accepted (Ctrl+Alt+D
and Ctrl+D work!).
The problem exists only on my privat computer. My business computer uses
the same templates and addins - und allows to choose the Insert key and
the shortcut Alt+D. I recognize no differences in the environment.

Why this behaviour?

Thank you for any advice,
Reinhart.