Trouble with Nurture Campaign Distribution

I'm stumped as to why my nurture campaign is not distributing. Under the nurture program, it says "6 days until next cast" and I have the cadence set for every Tuesday at 9:00 am. All 5 emails are activated under Stream 3, and the campaign itself is triggered.  It worked in the past for stream 1, but when I check on the results there are no new emails being distributed.

Any ideas as to why this might be?

Thanks for your help!