Confused about creating a job to duplicate from Disk->Tape

Backup Exec 2010 R3
Windows Server 2008 R2

I just setup a job which I will run manually once a month to backup data to a B2D folder on our network.

I need a job to run immediately after that job finishes which will duplicate the B2D media to a tape in the SDLT tape drive physically connected to this media server, so the tape can go offsite.

However, when I attempt to create this job by clicking "New job to duplicate backup sets", and choose "Duplicate backup sets following a job", I am not permitted to select the new Monthly job I created as a Source Job.

What am I doing wrong?