I got the rooted and the CWM recovery installed but for some reason, it didn't topic

I got the micromax a311 phone rooted and the CWM recovery installed but for some reason, it didn't appear to have installed the SU Binary.

When I boot the phone, it says "Unlocked" but it doesn't have the usual "Tampered" word. I used the Root Checker app and it says its not rooted .

Any idea how I can manually install the SU Binary?

Model Micromax a311
version 4.4.2
build number 4.4.012.p1.14110.a311

please help me