Error with custom rendering my list view..please help !

Question

Hi, I am trying to render my listview containing names of doctors and few more details using a tablelayout component showing 4 textviews in each listview item. But I get an error while I am doing this..PLEASE HELP! I have a project deadline tomorrow.

When I debug by code, the control goes till IconicAdapter() constructer, from there it comes back to setListAdapter() in the onCreate and returns an error.

Any help is GREATLY Appreciated...thanks a ton in advance!

    public class DetailedDoctor extends ListActivity
protected static ArrayList<Message> selectdrs;
protected Message msg[];
@Override 
public void onCreate(Bundle icicle) { 
    super.onCreate(icicle); 
    setContentView(R.layout.main); 
    selectdrs = MessageList.selectmsgs;
    setListAdapter(new IconicAdapter(this)); 
    //setListAdapter(new IconicAdapter(this));
    //selection=(TextView)findViewById(R.id.selection);

}

public void onListItemClick(ListView parent, View v,
                                                        int position, long id) {
 // selection.setText(items[position]);
}

private class IconicAdapter extends ArrayAdapter<Message> {
    Context context;

    public IconicAdapter(Context context) {
        super(context, R.layout.selectdr, selectdrs);

        this.context=context;
    }

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

        if (row==null) {                                                    
            LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);              
            row=vi.inflate(R.layout.row, null);
        }

        Message msg = selectdrs.get(position);

        if (msg != null) {
        TextView drn = (TextView) row.findViewById(R.id.drname);
        TextView  deg = (TextView) row.findViewById(R.id.degree);
        TextView  ofc = (TextView) row.findViewById(R.id.loc);
        TextView rat = (TextView) row.findViewById(R.id.rating);
        if (drn != null) {
              drn.setText(msg.getTitle());                            }
        if(deg != null){
              drn.setText(msg.getGenre());
        }
        if(ofc != null){
            ofc.setText(msg.getGenre());
        }
        if(rat != null){
            rat.setText(msg.getTitle());
        }
        }   
        return(row);
    }

} }