Trouble Making Custom Colored Wall Buys

Memeking254

So I tried to Change the Color of the Wallbuys and im having this strange issue when I convert them or something Im not sure whats causing the issue but instead of changing the color it just makes tne entire Wallbuy one color in game and doesn't show the Outline of it basically

After Converted it to DDS and then to IWI I re opened it and it appeared like this in game and in photoshop

so in game its just entirely purple if anyone has any idea how to fix it that'd be good

also the file used is called fxt_zmb_wep_wallbuy_02

The Original Image looks like this

Anyways thanks for whoever helps me