Android : I am unable to uncheck radio buttons in listview

public View getView(final int position, View convertView, ViewGroup parent) {

            final Constructor row = buttonList.get(position);
            LayoutInflater inflater = LayoutInflater.from( context );
            View v = inflater.inflate( R.layout.breakfastitems_view, parent, false );
            RelativeLayout relative1 = (RelativeLayout)v.findViewById(R.id.relative1);
            final RadioButton chbox=(RadioButton)v.findViewById(R.id.rb1);
            final RadioButton rb2=(RadioButton)v.findViewById(R.id.rb2);
            chbox.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v) {
                RadioButton chbox = (RadioButton)v;
                if(chbox.isChecked()){
                    Boolean value=false;    
                rb2.setChecked(value);

                rb3.setChecked(false);
                rb4.setChecked(false);
                rb5.setChecked(false);
                rb6.setChecked(false);
                }
                selected_total.set(position, selected_cost.get(position));
                selectprice.setText(selected_total.get(position));
            }
         });
        rb2.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v) {
                if(position==1){
                chbox.setChecked(false);
                rb3.setChecked(false);
                rb4.setChecked(false);
                rb5.setChecked(false);
                rb6.setChecked(false);
                }
                selected_total.set(position, selected_cost.get(position));
                selectprice.setText(selected_total.get(position));
            }
         });

I am unable to uncheck this radio buttons. Thanks for help in advance.