Trying to set up Active Directory on Server 2008 R2 and I get a blank Active Directory Administrative Center window

This one really has me stumped.

I've got a Windows Server 2008 R2 box that I administrate over RDP on a regular basis with no problems whatsoever. Today, I decided to try to set it up as a domain controller, so I added the Active Directory Domain Services role.

I set everything up with dcpromo.exe. Here's my dcpromo.exe unattend file:

; DCPROMO unattend file (automatically generated by dcpromo)
; Usage:
;   dcpromo.exe /unattend:C:\Users\Administrator\Desktop\ActiveDirectoryConfig.txt
;
[DCInstall]
; New forest promotion
ReplicaOrNewDomain=Domain
NewDomain=Forest
NewDomainDNSName=xxxxx.local
ForestLevel=4
DomainNetbiosName=XXXXX
DomainLevel=4
InstallDNS=Yes
ConfirmGc=Yes
CreateDNSDelegation=No
DatabasePath="C:\Windows\NTDS"
LogPath="C:\Windows\NTDS"
SYSVOLPath="C:\Windows\SYSVOL"
; Set SafeModeAdminPassword to the correct value prior to using the unattend file
SafeModeAdminPassword=
; Run-time flags (optional)
; RebootOnCompletion=Yes

I rebooted, then tried to open Active Directory Administrative Center - and I just get an empty window. It's like it's not drawing it properly onscreen. Within the RDP client I changed the color depth to 32 bit from 16 bit - no change. Tried to disconnect from RDP then reconnect - no change. Everything else works great and displays as it should, and I don't have physical access to this box so I can't plug in a monitor.

Any idea what's going on?