Original Agent Name blank

Can anyone help me figure out why Original Agent Name is always blank. Here is my setup:

Logger forwards events to ESM

Connectors are on devices

Connector Appliance manages connectors remotely

Connectors have two destinations (one to logger and one to ESM with all events filtered out)

ArcSight ESM 4.5 SP2 Patch 2

CA 6.0

Logger 5.0 Patch 1