If you're seeing the new logo, HackBGRT is working as well as it can. So you've done everything right!

Your computer may show the original (manufacturer) logo before loading any software. It's not...

You can change the boot logo in UEFI mode by modifying the relevant ACPI table (BGRT) with an EFI application before booting. AFAIK, the only application for this is currently my own, HackBGRT....