Clicking on Newsfeed site is creating with server login user name.

HI All,

In SharePoint 2013 when i am clicking on Newsfeed it was showing with server login name instead of current user name.

Example:Sever login User1

Site collection Login with User2

Now when i am clicking on the newfeed mysite is creating with User1.

Can you please help on this any one why it was happening........Previous it was fine only.

Thanks

Please help me..