Run Program in Guest

I am using the workflow called "Rung program in guest".

If i specify this command C:\windows\System32\Net.exe    time

it works fine.

If i specifcy this  C:\Windows\System32\slmgr.vbs /ato

it failes

[2014-09-16 16:52:53.304] [I] A general system error occurred: A program could not run on the guest operating system (Workflow:Run program in guest / Scriptable task (item1)#15)

let me know .

thank you