This one won't work on HTC phones with Sense installed, the path to bootanimations is different there as well as the filename. The path there is /system/customize/resource and the filename would be hTC_bootup.zip for the animation while the phone is starting and hTC_downanimation.zip for the animation while the phone is shutting down (you can have different ones for starting and shutting down with HTC phones on Sense firmware). This is just to avoid issues for HTC users who don't have CM on their phone.
Current device: Oneplus One 64 GB Sandstone Black
No support via PM!
Please ask in a public thread, I'll help you as much as I can.