[Koha] Doubt about serials

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