[Plugin: Business Directory Plugin] listings not compatible with my theme

Hi,
I have installed Business Directory Plugin in my theme. The plugin works fine with the default theme (Twenty-Eleven). But when I used my own theme, the listings are not shown (Although the url changes, it does not go to the listings page and remain the same). Here is the screenshot of it: https://imageshack.us/f/842/ss1cq.png/. When I use the default, it looks like: https://imageshack.us/f/268/ss2jx.png/. Any ideas? Cheers.