notifyDataSetChanged macht Layout kaputt

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_height="wrap_content" 
    android:gravity="left|center"
    android:layout_width="fill_parent" >
    
    <LinearLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_height="wrap_content" 
        android:gravity="left|center"
        android:layout_width="wrap_content" 
        android:paddingBottom="5dp"
        android:paddingTop="5dp" 
        android:paddingLeft="5dp"
        android:orientation="vertical">
        
            <TextView 
            android:id="@+string/TextView01" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" 
            android:gravity="center"
            android:textColor="#FFFFFF"
            android:textSize="20sp"></TextView>
            
            <TextView android:text="" 
            android:id="@+string/TextView02"
            android:layout_width="wrap_content" 
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:textSize="12sp"
            [B]android:visibility="invisible"[/B]></TextView>
    </LinearLayout>

    <LinearLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="horizontal"
        android:layout_height="wrap_content" 
        android:gravity="right|center"
        android:layout_width="fill_parent" >
        
        <CheckBox android:id="@+string/CheckBox01"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content" android:gravity="right|center_vertical"
           android:focusable="false"
           android:focusableInTouchMode="false"
           [B]android:visibility="invisible"[/B]
           />
           
    </LinearLayout>

</LinearLayout>

static class EfficientAdapter extends BaseAdapter {
        private LayoutInflater mInflater;

        public EfficientAdapter(Context context) {
            mInflater = LayoutInflater.from(context);
        }

        public int getCount() {
            return listoptions.length;
        }

        public Object getItem(int position) {
            return position;
        }

        public long getItemId(int position) {
            return position;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            
            View row = convertView;

            if (row == null)
                convertView = mInflater.inflate(R.layout.listview, null);
            
            
            holder = new ViewHolder();
            holder.checkbox = (CheckBox) convertView.findViewById(R.string.CheckBox01);
            holder.title = (TextView) convertView.findViewById(R.string.TextView01);
            holder.status = (TextView) convertView.findViewById(R.string.TextView02);
            
            holder.title.setText(listoptions[position]);
            holder.status.setText(liststatus[position]);
            
            
            if ((liststatus[position].toString().equals("on")) || (liststatus[position].toString().equals("off"))) 
            {    // ELEMENTS WITH CHECKBOX
                holder.checkbox.setVisibility(0);
                
                if (liststatus[position].toString().equals("on"))
                    holder.checkbox.setChecked(true);

            } 
            else
            {    // ELEMENTS WITHOUT CHECKBOX
                holder.status.setVisibility(0);
            }
            

            return convertView;
        }

        class ViewHolder {
            TextView title;
            TextView status;
            CheckBox checkbox;
        }
    }