PakBlacklist-Development.txt problem

I spent whole night trying to get PakBlacklist-Development.txt to work but to no avail…
I have read documentation many times, read all the topics on his topic but it just doesn’t work…

I checked Use Pak File
I package game data in apk
I use relative path in my PakBlacklist-Development.txt (eg. …/…/…/Engine/Content/Maps/)
Path for my PakBlacklist-Development.txt: C:_UnrealProjects\Android3DPristine\Build\Android\PakBlacklist-Development.txt

What am I doing wrong?