Default [Q] Framaroot Error On Lava Iris 402

hi guys i m new here .... I Have a Lava Iris 402
I Rooted It By Reading About Framarooton these threads..of XDA forums
i rooted it with boromir exploit a time ago..but i had to take it to service center so unrooted it....but service center was closed...
so i came back home and again rooted it using framaroot and it worked.....
But For Fun I Unrooted it again and began using it...after some time when i tried to root it the error message on framaroot showed
Failed... Exploit worked but installation of super su and binary failed...

So I tried older versions and other exploits if framaroot but stilll it shows the same error message