关于java代理的问题.

[honey_001]

我复制lotus帮助中的代理,但运行却提示invalid document indentifier.
Attempt to access Database doladmin.nsf.
我的代理如下:
import lotus.domino.*;

public class JavaAgent extends AgentBase {

public void NotesMain() {

try {
Session session = getSession();
AgentContext agentContext = session.getAgentContext();

// (Your code goes here)
Database db = agentContext.getCurrentDatabase();
Document doc = db.createDocument();
doc.replaceItemValue("Form", "Main Topic");
doc.replaceItemValue("Subject", "New building");
if (doc.save())
System.out.println("Document created and saved");
else
System.out.println("Something went wrong");

} catch(Exception e) {
e.printStackTrace();
}
}
}
代理在表单中的按钮中执行,表单中有2个域,名称分别是form和subject.请问是哪儿错了?