Hi Violet, welcome to the forum.

You don't mention what your problem actually is, but the most common problem is that they come out as a solid piece, not looking very lash like at all.

To fix this, you'll need an eyelash transparency (there is one included in most texture packages). The settings should be something similar to the image. The "Blend Transparency" option is pretty important. I usually turn shadows off for lashes, unless doing a closeup where you want to be able to see shadows.

Hope that helps.