getItem() is returning null

I would like to validate the DCR. I have the following code in the datacapture.cfg file. titleItemName alert is returning null.

Can someone suggest what I need to do to fix this

Thanks in advance.
Sri

IWEventRegistry.addItemHandler("/Section/Container/Selected", "onItemChange", doValidateForm );
IWEventRegistry.addFormHandler("onSave", saveHandler);


//*********************************************************************************************
// saveHandler
//*********************************************************************************************
function saveHandler(button) {
var button_fun_status;
switch (button) {
case IWDatacapture.SAVE_BUTTON:
{
//alert("User clicked on save button");
button_fun_status = doValidateUserInput();
break;
}
case IWDatacapture.SAVECLOSE_BUTTON:
{
//alert("User clicked on saveClose button");
button_fun_status = doValidateUserInput();
break;
}

}

if (button_fun_status) {
alert ("returning true");
return true;
} else {
alert ("returning false");
return false;
}
}


//*********************************************************************************************
// doValidate User input
//*********************************************************************************************
function doValidateUserInput() {
titleItemName = IWDatacapture.getItem("/Section/Container/Selected/Title");
alert ("titleItemName" + titleItemName);
titleItemValue = titleItemName.getValue();
alert ("titleItemValue: " + titleItemValue);

}