till now i was using twitter api v1,but my application suddenly stopped twitting,it shows me login failed every time i try to login,when i show response it gives me msg like
This has been known for a long time.
You will need to rewrite your communication with the twitter API according to it's documentation which can be found here.
There aren't any specific answers to your question because you don't ask a specific migration question. So either specify what you would like to know, the only proper way to answer this question would be to write an entire twitter application which uses all api calls in v 1.1.
So read the documentation, adjust all your api calls. Make sure authorization is up to 1.1. and test. No tips and tricks, just plain ol' developing.
here are other resources that we’ve pulled together to help make this transition more smooth: