Alpha channel messing up

Hello i have a problem with the alpha channel of a unit:
instead of becoming invisible the parts i blocked with the alpha channel turn white (or whatever color i choose in the material property.



can someone tell me what is up with that, the white parts should be transparent.

i attach the horse archer.

got it to work, yay!

i just removed all texturing and material nodes and added them back step by step

edit: too early now the games crashes whenever i build the unit

help please

i took a different kind of horse and created a new alpha channel it works fine now, see here:

http://forums.civfanatics.com/showpost.php?p=9196053&postcount=107