GETTING NO ERROR BUT STILL NOT GETTING THE DESIRED OUTPUT!!!!!!!!

Question

HIII ,
AM DOING AN APPLICATION IN WHICH I AM TRYING TO INSERT VALUES IN A TABLE(CREATED THRU JAVA DICTIONARY), USING EJBS(ENTITY BEAN AND SESSION BEAN) AND COMMAND BEAN..AND WEBDYNPRO....
AFTER DEPLOYMENT EVRYTHNG IS RUNNING FINE BUT VALUES NOT GETTING ADDED IN THE TABLE...
THE CODE FOR THE "ADD" BUTTON IS :
wdContext.currentEmp_cmdElement().modelObject().add(wdContext.currentEmp_cmdElement().getEmpno(),wdContext.currentEmp_cmdElement().getEmpname());
THE CODE FOR ADD function IN COMMANDBEAN IS
public void add(String empno,String empname){
try {
local.createdata(empno,empname);
} catch (Exception e) {
e.printStackTrace();}
PLZZ DO HELP OUT!!!

Answer 1

try { aPreparedStatement.close();
           if(dmd!=null)
                        dmd = null;
           if(con!=null)
                        con.close();
            catch (Exception e)
                 e.printStackTrace();  
            }instead of catching the last error i printed it and it came up with an error of nullPointerException
for the line of code
try { aPreparedStatement.close();how can i fix this error please
and thank you