Silent install of RoboSource Control 3.1

I need to silently install both RoboHelp 8 and RoboSource Control 3.1 on several Windows XP machines.

Despite the confusing Adobe KB article, after much trial and error I was FINALLY able to get RoboHelp 8 to silently install with this command:

\\<server and path>\RoboHelp8\setup.exe -silent LANGUAGE=1033 -NODESKTOPICONS -RHPARAMETER="EPIC_EULA_ACCEPTED=1" -SERIALNUMBER="123456789012345678901234"

However, I am not able to get the RoboSource Control 3.1 silent install to work.  Here's the command I'm using:

msiexec /i "\\<server and path>\RoboHelp8\robosource\Setup.msi" TRANSFORMS=1033.mst EPIC_EULA_ACCEPTED=1 /qn

When I remove the /qn, I see this Windows Installer error message:

Error applying transforms.  Verify that the specified transform paths are valid.

The transforms 1031.mst, 1033.mst, 1036.mst and 1041.mst are at \\<server and path>\RoboHelp8\.

The transforms French.mst, German.mst and Japanese.mst are at \\<server and path>\RoboHelp8\robosource\. An English.mst does not exist.

I copied the transforms 1031.mst, 1033.mst, 1036.mst and 1041.mst to \\<server and path>\RoboHelp8\robosource\, but that did not make a difference.

Does anybody see why this isn't working?

Any help is much appreciated!

Brian