i need help i dont know what i do wrong with Max Payne weaponhud pcx and weaponhud alpha pcx image files Thread

i need help, i edited Max Payne weaponhud.pcx and weaponhud_alpha.pcx to a mod, when i added the files to .mpm file and when i run the game, the game exits with this error message "Exception in engineInit: Failed to decode PCX image: "Only 256 color paletted files can be loaded" " please help me i just a beginner modding the weapons.