[Koha] Doubt about serials

[Nombre]

Hello

After import books I'm dealing now with serials, but I think I'm doing
something wrong: I have some issues from a magazine, I've registered a
biblio record of type CR (continous resources), and I added some items.
I think is the best suitable for this purpose, but I can't see it in
OPAC, neither in staff, it's not found.

I'm so confused, I don't know what to check

Regards and thanks in advanced