button submit doesnt work with rich:pickList

Hi
İn my simple application I want to use rich:pickList .I use richfaces 3.3.0 GA ,jboss 4.2.3 server .
On my form picklist works fine but when the button doent works when I submit it?
I removed rich:pickList from form and submit button worked. Can anybody explain what is the problem

Pick.java

public final class Pick extends Object {
	
	private ArrayList testkod=new ArrayList();
	private List testad=new ArrayList();
    private Connection con;
    private Statement stm;
	
public void setTestkod(ArrayList testkod){
		
		this.testkod=testkod;
	}
	public ArrayList getTestkod(){
		return testkod;
	}
	public void setTestad(List testad) {
		this.testad=testad;
	}
	public List getTestad(){	
		return testad;
		}
	
	
	public void initdatabase(){

try {
			 if(con==null ||con.isClosed()){
			
			
			InitialContext ctx = new InitialContext();
			DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/AS400DataSource");
			con = ds.getConnection();
			
			 }

} catch(NamingException e) {
			 System.out.println("Kullanıcı:"+e.getMessage());
			 System.out.println("Kullanıcı:"+e.getClass().getName());
		} catch(SQLException e) {
			 System.out.println("Kullanıcı:"+e.getMessage());
			 System.out.println("Kullanıcı:"+e.getClass().getName());
		}

}
	public Pick(){
		try{
			this.initdatabase();
			// test adları listele----------------------------------------------------------------------
			
			String sql="";
			SelectItem item;
			this.testad=new ArrayList();
			stm=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
			ResultSet rs=stm.executeQuery("select TKTSKD,TKTSAD from DNMDAT.TSKOD00K");
			
			while(rs.next()){
				item=new SelectItem(rs.getString("TKTSKD").trim(),rs.getString("TKTSAD").trim());
				this.testad.add(item);
				
			}
			stm.close();
			
		}catch(java.lang.ArrayIndexOutOfBoundsException ar){
			 System.out.println("liste ekleme hata");
			 System.out.println("Kullanıcı:"+ar.getMessage());
			 System.out.println("Kullanıcı:"+ar.getClass().getName());}
			
		catch(java.lang.NullPointerException we){
				
			 System.out.println("liste ekleme hata");
			 System.out.println("Kullanıcı:"+we.getMessage());
			 System.out.println("Kullanıcı:"+we.getClass().getName());
			}
			
		catch(java.sql.SQLException de){
			 System.out.println("liste ekleme hata");
			 System.out.println("Kullanıcı:"+de.getMessage());
			 System.out.println("Kullanıcı:"+de.getClass().getName());
			} 
			
		catch(java.lang.Exception e) {	
			 System.out.println("listede ekleme hata");
			 System.out.println("Kullanıcı:"+e.getMessage());
			 System.out.println("Kullanıcı:"+e.getClass().getName());
			}
			
		 
		
		
	}

public void den(){
		
		System.out.println("show value show");
		 for(int i=0;i<this.getTestkod().size();i++){
				System.out.println("sonuc"+this.getTestkod().get(i));  
			  
			  }
	}

onay.jsp page