... the MIJ driver supports native XInput mode anyway, so bullsh*t like x360ce is not necessary at all.
Anyway, you shouldn't use DS3 tool with GInput. GInput uses XInput, which is a library for Xbox controllers used by many PC games in our Microsoft dominated world - as such, a patched version is required to use the library with any other type of controller. The patch is included, but since I heavily suspect you skipped the readme, you had no way of knowing.
Well for me that thing has never worked. But then I have a PS2 pad and even Windows confuses it for a PS3 pad. The emulator is the only thing that I can guarantee.