SDE instance not found in services file killing a lock with 10.2 GDB Admin Window

Hi,

I recently inherited an SDE database that desperately needs a compress. When I attempt, it fails because of a db lock. I attempted to kill the db lock using the 10.2 GDB Admin window and got the "SDE instance not found in services file" error. Screenshot attached.

SDE is running on a separate server:

Windows Server 2003 R2
SQL SERVER 2008 R2
ArcGIS 9.3.1 with no service packs

Is there anything I have to do to be able to kill locks from the db admin window?

Attached Thumbnails