How to get users to a Twitter viral app

I made a twitter viral app..
Basically the user click the login via twitter, and then when he login he will follow my account(s), post a tweet and mention some random users on their timeline. Anyway its all done and the problem is that i cant get user to use it.. any idea?

Yeah. Your app sounds like it sucks.

I don't understand what the point of it is besides promoting you? You have to ask the question as to why would your app benefit anyone else? Once you solve that problem and market it effectively then you may have the solution to your problem. But from what it seems you haven't put much thought into it. Good luck