by default, this ability is turned off. Runnig Shell commands on a Server is to avoided.
However, with you local server, you need to change the registry.
Cut and paste what you see below into a text file, call if Xcom.reg, and import this into your Reg my clicking the file. (There shold be three lines with text).
Or use regEdit, Back up your registry before modifiing in all cases.
This works with EG up to 4.1, as far as I know.