Dan,
1. Create a new folder "C:Test' or whatever name.
2. Goto C:Program FilesCommon FilesX10Common
3. Right click on the file "ahcmd.exe", select "Copy" from the menu.
4. Back in the "C:Test" window, right click in the open area of the window and select "Paste" NOT "Paste Shortcut".
5. Open a Command Prompt window. ( Start - Programs - Accessories - Command Prompt)
6. In the Command Prompt window type cd c: est press (enter).
7. Type dir press (enter)
8. You should see ahcmd.exe with a size of 61,440.
9. Type ahcmd press (enter) you should see expecting: {sendplc | sendrawplc | sendrf | queryplc}
10. Try a command. ahcmd sendplc a1 on
Caution: queryplc does not work!
Good Luck!