[TYPO3-english] Expandable menu

[* k-do *]

Hi,

I've never made a menu, my colleague does it, but now he is on holidays. I
have this structure:

- Item 1
- Item 2
    -item 2.1
    -item 2.2

And I want this one:

- Item 1
    - Item 2
        ·item 2.1
        ·item 2.2

I've cut the whole item 2 and pasted into Item1, but now the menu doesn't
expand. I've put back the item 2 where it was, but it's not expandable
anymore. How can I solve this?

Thank you!!