Problem: new skin doesn't have divider between posts

[uneek1]

I just recently bought a custom skin for vBulletin, everything's great, but the problem is that threads don't have any sort of divider between posts:

2:05 AM
The first problem I noticed, is that there's no divider line between posts. Do you know of a way to fix that?
NIchiro2
2:06 AM
YOu asked yesterday, you could change one alternate color, or add a border, but both wouold ruin the fluid look of the homepage, being that one color.

Here's what it looks like:
http://img378.imageshack.us/img378/3033/61695069mr7.png

Can anybody help me out?