First your need to create a reload job that is triggered "by an external event". For saety's sake, enter a password in the field provided.
QMSEDX.exe is not configured, your supply all info about the task to trigger via command line options. If you want to know which options are available, run QMSEDX.exe without any options.
You need to provide at least three options on the QMSEDX command line. These are:
-task=name : the name of the task to trigger. Note this is different if you use a Publisher!
-qms=qmsaddress : the name/address of the qms host. If omitted, localhost will be used.
-password=pwd : the password you configured in your trigger.
If any of these strings contain spaces or weird characters, put the string between quotes.
Run QMSEDX under an account that is member of "QlikView Management API" and "QlikView EDX" groups. Create these local groups on your server if they don't exist.
Some setting values may depend on the version of QMSEDX (or QMSEDX Enhanced) you're using and on the QlikView Server version. I tried to be as generic as possible. YMMV.