trouble adding arab cavarly unit into BI

i dont know where i've gone wrong. it keeps crashing before it loads into the game, i.e. shortly after double clicking the shortcut.

i thought it might be because i kept alternating between "cavarly" and "cavalry"...but it's most likely the entry i've got in descr_model_battle


this is what i have in the units file:

type merc arab cavalry
dictionary merc_arab_cavalry ; Saharan Cavalry
category cavalry
class light
voice_type Heavy_1
soldier east_bedouin, 27, 0, 1
mount light horse
mount_effect elephant -8, camel -4
attributes sea_faring, hide_forest, hardy,
formation 3, 4, 6, 6, 4, square, wedge
stat_health 1, 0
stat_pri 7, 4, no, 0, 0, melee, simple, piercing, sword, 25 ,1
stat_pri_attr no
stat_sec 0, 0, no, 0, 0, no, no, no, none, 25 ,1
stat_sec_attr no
stat_pri_armour 3, 4, 4, leather
stat_sec_armour 0, 0, flesh
stat_heat -2
stat_ground 0, 2,-6,-2
stat_mental 4, normal, untrained
stat_charge_dist 40
stat_fire_delay 0
stat_food 60, 300
stat_cost 1, 480, 120, 50, 80, 480
ownership berbers



and in the model file, this:

type saharan_cavalry
skeleton fs_hc_swordsman
indiv_range 40
texture berbers, data/models_unit/textures/unit_arab_light_infantry_merc.tga
model_flexi data/models_unit/unit_eastern_bedouin_sword_high.cas, 15
model_flexi data/models_unit/unit_eastern_bedouin_sword_med.cas, 30
model_flexi data/models_unit/unit_eastern_bedouin_sword_low.cas, 40
model_flexi data/models_unit/unit_eastern_bedouin_sword_lowest.cas, max
model_sprite berbers, 60.0, data/sprites/east_bedouin_sprite.spr
model_tri 400, 0.5f, 0.5f, 0.5f



i've most likely got the model wrong, correct?

thanks to whoever can sort this out for me, i'm a bit of a newbie at customising this.
although i did make a nice unit of captains.

i'm now reinstalling everything...:( it's still crashing even after taking the new entries out

it's OK i've figured out what i did wrong!

for some reason there are horse files in the RTW models file with the tag "horses_light", instead of "light horses". and including that in the BI file makes the game crash!

also for some reason, adding dictionary entries for the new unit causes the unit card to be replaced with the mysterious rebel peasant, because before i did that, i had the original arab cavalry card