external dataset - getting no data - no errors

[Valentin-]

Hi guys,
I heard about Laszlo last week, with the opensource anouncemend.
I am very interested in that technology, because it is fantastic what you are able to do with it.
I played around a bit with it, and got stock at
the ecluded dataset.

I have a normal dataset file called persons.xml
I am referencig it like that:
<dataset name="personsData" src="data/persons.lzx"/>

To check if it works, I just added a text-element:
<text datapath="personsData:/persons[1]/person[1]/firstName[1]/text()" />

Now I am wondering why the output is empty, and there also no error-messages, which would indicate, that there any mistakes made by me.

Hope anyone had the same problem.

Thanks for your help.

Bye Valentin-