Mitsubishi AC (IRremote) doesn't turnOFF

Hi you all,
I tried to switch on my Mitsubishi AC(Mitsubishi IR AC remote decoding Problem - Programming Questions - Arduino Forum).

I send the codes correctly even if the "decoding sketch" does not always work well (sometimes takes different codes when I press the same button ). the problem is something else: I can not turn it off.
I noticed that each configuration corresponds to a configuration of switching off:
ON (temp 22 etc ...):
C4D36480 00041A60 68360000 00000800 00A4 / / switch on .. works

OFF
C4D36480 0001A606 83600000 00008000 0A0 / / it does not work

ON (temp 24 etc ...):
C4D36480 00041A10 68360000 00000800 00E4 / / switch on .. works

OFF
C4D36480 0001A106 83600000 00008000 0E0 / / it does not work

as you can see in the codes OFF missing a hex at the end ...

if I send:
irsend.sendMitsubishi (0xC4D36480, 0x00041A60, 0x68360000, 0x00000800, 0x00A40000); works

but if I want to turn it off by sending:
irsend.sendMitsubishi (0xC4D36480, 0x0001A606, 0x83600000, 0x00008000, 0x0A000000) does not work.

What do you think about?

any solution?