HELP !My onscreen (navigation bar) volume disappears android 4.0

[Andrew TheEffigy]

I have Micromax funbook infinity p275 and it runs on Android 4.0 (ice cream sandwich) and my volume controll buttons disappears from the navigation bar. Please help me restore it without a factory reset. This has been the second time. When i go to Talking Tom app, and exit it, it appears again but not for long... Please Help !!!!!l


I put the picture in the attachment files

 

[Andrew TheEffigy]

Turn on the notification..SOLVED