Twitter Authentication issue


Before some days my application was working with Twitter API keys which are created for my application, but now a days these keys are not working, I change OAuthVersion 1.0 to OAuthVersion 1.1 but still I am not able to authenticate with these keys , how to check these keys changed ? and returning {“errors”:[{“message”:“Bad Authentication data”,“code”:215}]} How to resolve this problem to Authenticate with Twitter account

json result returning null with following url , how to return json result with this url

All API keys with twitter id returning correctone then why json or xml result getting null Please reply to this issue