Kernel does not install

[stirlitz99]

Hi there,

I'm not new to this... but I have no idea about the problem.

XT1052, opened bootloader, TWRP 2.8.7.0 (installed 2.8.7.2 but the .2 does not show), BlissPop 4.0.3 ... it works fine.

I try to install any kernel in TWRP... it is done faultless, but does not appear in the ROM.

What can be the problem?

Thanks for the help!