He mean to say flash UB-1 rom again..i think u havn't downloaded it yet.if so the get it n flash it,u will get root.See for Superuser app in launcher.Micromax A75 New is stock mmx rom which is not rooted,obviously.
Now connect device in debugging mode,open command prompt on ur pc,issue "adb shell" without quotes,u should get superuser shell prompt now with "#'...if u see "$" instead then issue "su" without quotes n i will get superuser prompt with "#"