Backup Exec chooses the second tape from scractch media

Dears,

Hi

I changed  the "Media overwrite protection level" to "None" . Because Backup Exec wasn't writing full of tapes in different jobs.

I changed the " Media overwrite options" to " Overwrite media contained in the targeted media set before overwriting scrach media " because Baclup Exec wasn't picking medias which were assigned to media set.

I use "Append to media, overwrite if no appendable media is available " in job seetings.

My media set is Oevrwrite:1 Year and Append: 1 Month

Now backup Exec writes data on the associated media when starts but when the first tape becomes full, Backup Exec picks tape from scratch media.

How can I force backup Exec to pick the second tape also from the associated media?

Thanks