Bind XML elements to dropdownlist items don't work

[patiropc5904644]

I tried to bind xml elements to dropdownlist  (to be items for selecting).

This is my xml:

<?xml version="1.0" encoding="UTF-8"?>

<Lesson>

<Code/>

<Name/>

<Description/>

<Require/>

<CertFlag/>

<Contents>

<Content>

<Subject/>

<Body/><Reference1/><Reference2/><Reference3/>

</Content>

</Contents>

<LessonDdl>

<Item>

<Code>0001</Code>

<Name>Test1</Name>

</Item>

<Item>

<Code>0002</Code>

<Name>Test2</Name>

</Item>

</LessonDdl>

</Lesson>

I create drowndownlist then setting like this.

after save and preview PDF, the dropdownlist won't display any item. What I wrong?