ROM Hack Cia install failed module 32

[Blakinu]

I downloaded monster hunter 4 ultimate for the nintendo 3ds and then when I tried to install it, at the very end of it a exception came out;

Failed to install cia
Result Code: 0xD8E0806A
Level: Permanent (27)
Summary: Invalid Argument (7)
Module: AM (32)
Desc: Cert signature or hash check failed (106)

Any idea how to fix this¿?