help pls...

guys.pls....help.....

i m quite new in india forum..but regulaer.................but guys pls tell me how can i change my..side avatar...........b'cos when i m logged in it shows.the avatar tht i hv chosen 4 me(its a jatin shah's pic).....................but whenever i mnot logged in or some 1 else is...reading my post...............the side avator shows........................a white glob.............😡😡😡.........even....u now r seeing...my side avator...which is a glob..........even.i have a cool signature of dmg..but its also not showing...............pls.......guys help me.......................😭