EERM-wise there's one thing I can suggest here, as far as the DLP-policies go, I have no clue.
Check to see if you and your director both get another AD Policy assigned. I've seen a customer reporting that if the Security policy "Device --> Allow formatting/ejecting of removable media" was set to Administrators only, it could not initialize. Myself I was not able to reproduce this here (still waiting for a VM to do so) but apparently changing this setting to allowing normal users to do this also, worked for them.
Might be worth giving a shot?
I don't think it's EERM related as once something get's through the DLP it works OK.
It's up to tier III support now but based on their emails so far it looks like they don't have a clue......
I believe if you're logged in as an admin, you get to see the device id, whereas as a general user you don't.
Windows prevents more info in the former case, so you'll need to define rules which encompas both situations.