I have the same issue; did you find a solution?.
i have not installed Move 4.0 yet, but testing much with DXL integrations. Just a question, have you installed the DXL client on a move client? If there is no DXL client installed an endoint is not able to talk to the DXL fabric.
it's mandatory deploy DXL client before deploy OSS component for VirusScan. I reinstalled the software in the right order (VS, TIE component, DXL, OSS) and it works fine.
The protected machines don't have DXL client, only the OSS server.
...and use Move 4.5 with TIE 2.0. Move 4.0 is awful slow with TIE 2.0.