failed to use enc2xs

hello all,

ISO 5426 is a wildly used format for bibliographic exchanges between
libraries. I wrote an ucm file for it and try to build an XS.

enc2xs -M ISO5426 *ucm
perl Makefile.PL
make test

no fail there but if i add

diag(join ',', Encode->encodings);

i now get:

t/ISO5426.t .. 1/2 # ascii,ascii-ctrl,iso-5426,iso-8859-1,null,utf-8-strict,utf8
t/ISO5426.t .. ok

i think it means my new encoding isn't available. I don't figure out
what to do now. Can someone give me a clue ? 

if you want to check by yourserlf: ucm file is there:
http://khatar.phear.org/iso-5426.ucm

regards,
marc Chantreux