Ember in the Rain LLC

The strangest thing is happening. When you go to my website. http://www.c4davenue.com and you click on the REVIEWS tab. It takes you back to the main page. It is supposed to take you to the (DP30)Custom Pages index. I have figured out that the reason this is happening is that the link is sending people to --> http://c4davenue.com/index.php?/app=custompages When they should in fact be going to --> http://c4davenue.com/index.php?app=custompages notice in the correct address that there is no "/" after the "index.php?" I'm sure this is an easy fix but I am not sure where to do it. Does anyone know where I would change this? ~Shawn