Button Mod Help

[Stew U-582]

I am working on a mod that gives extra command buttons on the Orders Bar
Ive come accross a problem converting back into the dds format.

Ill explain what ive done and hope someone can help me out


Ive taken the TGA fille for the orders buttons
using the dds converter ive changed it to a bitmap
ive added new icons using ms paint as an editor
Ive converted the bitmap into a TGA and DDS file then saved in the correct folder

Now it all seems to work except for one thing
all the icons appear but instead of being transparent and showing the button colour , green or yellow they are black.
I still get the icons detail in grey and you can see the button colour , green or yellow , as a thin boarder around the outside.

Can anybody shed some light on what Im missing in the editing procedure.