Auto is spawned by afterstep, so no command line invocation will work.
An appropriate invocation from afterstep looks like:
Module Auto 325
or, from a menu:
Module "Audio" Audio
Module "Auto" Auto 325
Module "Wharf" Wharf
Module "Ident" FvwmIdent
Module "Pager" FvwmPager 0 3
The numeric argument is required. It specifies how long a window must
retain the keyboard input focus before it is raised. The delay is
measured in milliseconds, and any integer 0 or greater is acceptable.