mod_rewrite install? website script requires something.

I have a URL shortening script similar to [login to view URL] which places an advertisement between the content and the person who clicked the link. The problem is, the shortened URL links do not work when clicked. the links just goes to a blank page. I have looked around and think it has something to do with mod_rewrite. I do not have it installed on my server it seems and the script requires it. This is a 100% working script. I have seen the demo in action so this problem is in my server. Here is the demo of how it should work: [login to view URL] ..... This is my link where the script is installed that doesn't work: www. adco .me . So basically what i need is to get this script working by installing or configuring whatever it is that is not allowing the script to create the shortened links. I have a budget of $30 and would like to take care of this as soon as possible. I will be at the computer for hours so please contact me and i will respond right away. Thank you. I have a dedicated server/cpanel/linux/apache.