Issues with a mount ID

Skytor

Citizen
i HAVE A horse that i want to look like Th e charger of the fallen. I set it bodyvalue as The Body and when I mount it it goes invisible. How d o I fix this issue.
 

Falkor

Squire
Set the horse's bodyvalue to 284 and its ItemID to 16018.

Or, if you prefer hex, bodyvalue 0x11C and ItemID 0x3E92.