New AuthFilter not seen in JigAdmin 2.0

I'm implementing a new AuthFilter, let's say NewAuthFilter
(in the jigsaw.auth directory).

After having modified the relevant makefile, I've rebuilt jigsaw,
then launch it along with JigAdmin. The problem is that JigAdmin
doesn't "see" the new class, i.e. NewAuthFilter does not appear in
the Frame list of the JigAdmin interface.

I've gone through all the documentation on filters and frames but
I haven't been able to find any tips about the matter.

Do I have to change something in the .zip files or another file?

Thanks,

Ch. Buchs