Backup Exec 2012 - No Media error when media is available

I'm getting an alert on my backup that says, "Please insert overwritable media into the robotic librarty using the import command." 

My job is set to keep data for 4 weeks.  When I go into my media set for keep data for 4 weeks I have a tape that's overwrite protection period is overwriteable.  Any thoughts on my BE isn't picking that tape up and writing to it?

*Note: all my other tapes are still within their overwrite protecion period.

Thanks in advance for your help.