ashQuick.exe requires full path name of the file to be scanned passed on the command line.
E.g.
ashQuick.exe possiblevirus.exe
does not work even if ashQuick.exe and possiblevirus.exe were in the same directory. You'd have to use
ashQuick C:\somepath\possiblevirus.exe
instead. This behavior is by design.
Hope this helps,
Vlk