GCL initialization file

[John T. H. Wong]

Dear GCL users,

According to the documentation of GCL, current directory's init.lsp
file and system-directory's sys-init.lsp can both do the initialization
job.
I got the si::*system-directory* by
(write-line si::*system-directory*)
However, putting a sys-init.lsp file in the si::*system-directory*
but nothing happen while init.lsp in current directory do work.
What have i missed? Can somebody point me the way?
Thank you very much.

Regards
John