Trying changing the ECM to via/seca, you then need to access your cam menu, and check the status of the card if it say AutoSVi, that means most Seca channels would show with the exception of Taquilla and Palco, but you wouldn't get multivission, if you want most Viacess to show you have to issue a cam reset, until the card status change to AutoV1.
I have not tried yet to what Prince told me but, seeing talking about pids and pmt settings I have a new question:
my Humax5600 is an OpenTV and doesn't allow to set pids and pmt settings.
I think they should be auto or I can't see those channels for that reason???
Thanks Prince I'll try soon your advice!!