Dual Monitor support rdp 7 to win 7 on esxi

I am trying to RDP from a Windows 7 Professional dual monitor physical machine to a Windows 7 Professional VM hosted on esxi 4.0.

I can get the spanning option to work to both monitors, but I have tried 3 different methods of connecting but have not been able to use true multiple monitors.

At different times, I tried checking the "use all monitors" option, command line mstsc /multimon and added the line use multimon:i:1 to the .rdp file. None of these worked. Any ideas? The physical machine can connect to other Windows 7 physical machines with true multi monitor access.

I also have the same issue when going from a 32bit RC1 machine to a Windows 7 Professional x64, but not when going in the reverse direction. Here's the .rdp:

screen mode id:i:2
use multimon:i:1
desktopwidth:i:1440
desktopheight:i:900
session bpp:i:16
winposstr:s:0,1,341,118,1139,568
compression:i:1
keyboardhook:i:2
audiocapturemode:i:0
videoplaybackmode:i:1
connection type:i:1
displayconnectionbar:i:1
disable wallpaper:i:1
allow font smoothing:i:0
allow desktop composition:i:0
disable full window drag:i:1
disable menu anims:i:1
disable themes:i:1
disable cursor setting:i:0
bitmapcachepersistenable:i:1
full address:s:192.168.1.5
audiomode:i:0
redirectprinters:i:1
redirectcomports:i:0
redirectsmartcards:i:1
redirectclipboard:i:1
redirectposdevices:i:0
redirectdirectx:i:1
autoreconnection enabled:i:1
authentication level:i:2
prompt for credentials:i:0
negotiate security layer:i:1
remoteapplicationmode:i:0
alternate shell:s:
shell working directory:s:
gatewayhostname:s:
gatewayusagemethod:i:4
gatewaycredentialssource:i:4
gatewayprofileusagemethod:i:0
promptcredentialonce:i:1
use redirection server name:i:0
drivestoredirect:s:

I believe Oscar Duveborn answered this question in a posting on another question: You need Windows 7 Ultimate or Enterprise at the end-point to support multiple terminal services displays (or any edition of Windows Server 2008 R2). Can anyone confirm there is no way to install/upgrade rdp7.0 on professional to get true dual screen rather than spanning?