XML file data source

Hi,

I have fairly complicated form (5 pages) and at the end I have fields for file attachments.
What it is in the structure is a subform of the whole section, lets call it "uploads". This subform contains several others some as static (just to position stuff correctly) and some repetative (to upload more files of that type kind).
Lets put the hierarchy this way:

Form
- subform 1
- subform xx
- uploads
-static sub 1
-filename (this is the actual filename I want to collect in the submited XML)
-static sub 2
-filename (this is the actual filename I want to collect in the submited XML)
-repetative sub 1
-filename (this is the actual filename I want to collect in the submited XML)
-repetative sub 2
-filename (this is the actual filename I want to collect in the submited XML)
-static sub 3
-filename (this is the actual filename I want to collect in the submited XML)

I have a XML sample file from which I do the data connection and looks like this:

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

.....
.....

......

.....

etc.. the XML code is well formated, I checked that.

What I am facing is, that I can map filename property to the fied in the repetative subform and repetative sub 1 property to the subform itself. It works for the first one, however, I am not able to do it for the second one. If I choose it I get SOM $error that about invalid node.
I don't know what can cause this because either XML or the subform are 1:1 just with different names.
Please advice

Thanks

J.

PS. spaces in the naming is just for easy reading