Tweets Search using Geo Code not working



I’m facing issue of collecting tweets using geo code not working, no of tweets returned are 0 from last week,on friday (27 March 2015) , I updated tweetinvi to & then it started workin, but on Monday (30 March 2015) again it stops working, then i update to and it works, but at night it again stopped working, and right now i have also used Twitter API call for search tweets but it was also giving same results no tweet with geo code, but works without geo code like as tweetinvi.
Please help me in this.

Thanks in advance.