new problem

here is my problem i have a .blp of a skin that i have imported, using the import manager. I put in the correct pathway and it is the correct size, but when I load I get green and black blocks where my unit should be. i have done it this way many times and it has worked fine, i have even done it with a not so complete version of my skin, and that worked but now it has stopped could someone tell me why.

Try getting a new tga of the same unit and Copy and paste it over the new tga. The alpha channels may be corrupt.

its not that now im getting a box and an erorr msg from all my maps that had a version of my priest skin in it plus i already did that and it didnt work