Shutdown.exe won't run on Limited User account

Win XP SP3 Stand alone PC

My Username has always been an Administrator but for security, I decided to create another Admin account and change my own account type to Limited. Now, using MY account, several problems including shutdown.exe won't work at all. I can turn off the computer using Start>Turnoff Computer>Turnoff but not using the shortcut button to shutdown.exe on my desktop.

What can I do to use shutdown.exe OR can I create a shortcut to "Turnoff"?

Thank you.