Can't Add my custom Kafra

[KeiGardev]

Hello I made some Custom Kafras, In GIMP they are in bmp 24 Bits 450 x 675 px, and I put them in the directory data\texture\À¯ÀúÀÎÅÍÆäÀ̽º\illust\kafra_01.bmp

But when I talk to the Kafra there is a error of Resource File Loading fail, I have tried a lot of thing but the problem persist, someone can tell me what is wrong with my bmp?

Thank you in advance

 

kafra_01.bmp

[KeiGardev]

Solved, I opened the bmp on paint and Save it as 256 color bit map