You need to use a program that actually makes transparency. I even tried Ifranview for it and it doesn't work. It seems it has to do more with removing the background to create transparency than anything else (although the terminology for that I don't really know).
GIMP is another choice for transparency and editing in general.
http://img687.imageshack.us/i/weirdmcissue.png/
How do I make the white areas transparent again. All white spaces are like this.
GIMP is another choice for transparency and editing in general.