DELPHI 4.0 and EXCEL 97 OLE

  I tried to open an ole connection with excel 97 on winnt and win95 ws
and
it is not possible instead I geht the message "...class EOleSys Error
with message 'Server execution failed'..."
It works if I CreatOleObject with WORD97.
Even a teaching example from a book does not work.
can anybody give me a hint what could be wrong or should be changed for
excel97
thank you
Roman