Rate limit exceeded - API


I used Twitter as the form to login to my iOS Application, but whenever I hit the Twitter icon, I get the Error "Rate limit exceeded. I’m just trying to login to the application using the Social Framework.

Can you please help me out with the solution and give me the reason’s why it would be happening ?

I have cross checked the same by logging into the application from other 5 accounts and all were successful. But this one account will always give me an error “Rate limit exceeded”. Please help me.