it's on the same directory where the script above is located
This is not where a relative path looks. It starts from the working directory.
The working directory of a shortcut is not necessarily the directory containing the shortcut. You should edit the shortcut properties and set the working directory you want, instead of using the default (which is often C:\Windows or C:\Users\%USERNAME%)
Or you can put an absolute path in the script, or have the script change working directory to its own directory, or have the script combine its directory and the filename to dynamically create an absolute path.
