Default I want micromax a27 stock rom

Sir,
I want to tell that after flashing my Micromax A27 "Settings>Security>Device manager" option is not working. Why? Pls help me because I am not able to activate any security systems because they needs Device manager option. Pls help.

Also is there the old cwm flashable stock rom of Micromax A27. Pls help.
Sent from my Micromax A27 using xda app-developers app