Struggling to get transparency right with this object

I am trying to make a rain sheet for screenshots but I can't seem to get the transparency right. I tried using the same base as another project I'm wrapping up to just get the plain its self to be transparent unless texture is applied, and depending on which texture it's using it does work for that. But the rain drops that are transparent are either showing up solid, or for my lighter ones they nearly disappear or look really bad.

I have tried using other objects with different levels of transparency as a base, both EA and CC but I can't seem to get the texture to be accurately represented in game.




Package: drive.google.com/file/d/0B9K8niVz-lDBTVBFODNvaW1Ud2s/view?usp=sharing (most edited to try and fix transparency)