The resource could not be backed up because an error occurred while connecting to the Backup Exec for Windows Servers Remote Agent

I keep getting the error message below when attempting to run a Daily Backup. Can anyone please point me in the right direction? 
Running on Backup Exec 2010 R3
Please see below:

Job name            : Daily Backup - Differential
Job type            : Backup
Job status          : Failed
Job log             : D:\Program Files\Symantec\Backup Exec\Data\BEX_BPHBUHQ01_02209.xml
Server name         : XXXXXX
Selection list name : Daily Backup - Differential

Device name         : Backup-to-Disk Buffalo
Target name         : Backup-to-Disk Buffalo
Media set name      : Keep Data for 4 Weeks

All Media Used
B2D001096
B2D001100
B2D001097
B2D001098

Error category    : Resource Errors
Error             : e000846b - The resource could not be backed up because an error occurred while connecting to the Backup Exec for Windows Servers Remote Agent. 
Make sure that the correct version of the Remote Agent is installed and running on the target computer.  If the server or
For additional information regarding this error refer to link V-79-57344-33899