Problem with costom menu on nokia 3310

[thewall1980]

Hi guys, i have a problem with my personal menù on nokia 3310 (V5.47) build with Nokix 1.38.
I want to add a new menù named Extra on my phone with some function and I modify the structure given by dump menu script of nokix.
I add this strings to the original structure:

#Extra
@item title=Extra action=0x3e msg=0x387
@menu dispmode=0x80
@header action=0xd flags=0x1

@item title="Livello Vibra" def=vibra_power

@item title="Termometro" def=thermometer

@item title="Luci Ritmiche" def=rhythmic_leds

@end


I use the write menu script and the process successfully finish but when i flash the new fls file there are all menu except this, why?. What's wrong?. Please help me. Where I can find a very good tutorial on this argument?. Thanks!!!!