Smile [Q] Camera app is missing in my micromax a110

Hello people,

I have been using Micromax A110

Previously it was in the version of Android 4.0.1

I upgraded it to Android 4.2 JB

Followed this :

camera app is missing now.

Now, I have upgraded it to galaxy V3 custom ROM :

Same issue persists.

Please help me in getting my camera app again

Hint (looks like driver is missing) cos when i put the same OS (ANdroid 4.0.1) camera is working.

What I have to do to get this fixed?