Is it a navigation menu you want to create, or a list of documents and links to them? If it’s navigation, it might be better to look into Wayfinder.
If you are using Ditto, and you have the current version (2.1) as installed with MODx 0.9.6.3, then some of your parameters won’t work at all, and some are only there for compatibility with older versions. You’d maybe get closer to what you want with something like:
[!Ditto? &parents=[*parent*] &depth=`2` &display=`1` &orderBy=`menuindex ASC` !]
&startID is obsolete (it is turned into
&parents for the sake of compatibility), and [*parent*] needs only one pair of brackets;
I don’t think
&hideSubMenus exists in Ditto 2.1 (there is a
&hideFolders parameter, which takes
`1` and
`0` as values rather than TRUE and FALSE);
&summarize is turned into
&display by the snippet code;
&start=`14` tells Ditto to skip the first 14 returned documents - is that what you mean to do? And then only display the first of them?
Can you provide some picture of the kind of structure you want to build?

KP
Notes on using Ditto 2.1 at
http://www.pogwatch.com/ditto/