Added after 1 hour 53 minutes 26 seconds:
Update: my unit appears with a default icon, not with that which I have assigned. Everything else is ok.

Added after 19 minutes 47 seconds:
I have tried with icons 77x60 and 60x60 pixels big, in both cases testing with code icon_unit_Elpardo.tga,0,0,77,60,0 and icon_unit_Elpardo.tga,0,0,60,60,0, but without success

Added after 1 hour 13 minutes 35 seconds:
Problem solved!! I forgot to add code in dbsprite_uniticons_packed.csv...