InfoPath Dev

 I successfully run the code

•  Hilary Stoupa How to Copy Repeating Data From an External Source into My Form
  http://www.infopathdev.com/blogs/hilary/archive/2008/07/04/how-do-i-copy-repeating-data-from-an-external-source-into-my-form.aspx
  Sample download
  http://www.infopathdev.com/files/folders/examples/entry30104.aspx

 in Infopath 2010

But when I try to repeat the described step by step the code failing.
Checked the execution in debugger but could not find the differences between my failing  and succeeding (enclosed by Hilary sample) form and code as well as the reason of failing of my form code.

Any ideas?

The reason the code isn't working is that the my: namespace in the XML you're constructing is different from the form's my: namespace.  Once that's fixed, a remaining issue is that the capitalization on your <my:DealerID> tags is incorrect.  Fixing those should make the code run correctly.

Jimmy!

Oh, my

 Manyyyyy thaaaaaaaaaaanks!

Jimmy:

a remaining issue is that the capitalization on your <my:DealerID> tags is incorrect

This I saw, correcting it did not help. Though, honestly, I forgot to recall that capitalization makes difference in XML, so I eventually neglected it

Jimmy:

The reason the code isn't working is that the my: namespace in the XML you're constructing is different from the form's my: namespace.

Well, in other words, the article

• Hilary Stoupa How to Copy Repeating Data From an External Source into My Form 

should have mentioned to replace  http://schemas.microsoft.com/office/infopath/2003/myXSD/2008-06-03T00:09:57 in

 string vehicleXml = "<my:Vehicle  xmlns:my='http://schemas.microsoft.com/office/infopath/2003/myXSD/2008-06-03T00:09:57'>"
                                    + "<my:Year>" + year + "</my:Year>"
                                    + "<my:Make>" + make + "</my:Make>"
                                    + "<my:Model>" + model + "</my:Model>"
                                    + "<my:Color>" + color + "</my:Color>"
                                    + "<my:Dealers>";

by value from Infopath form (right-click myFields from Main Data Source > Properties > Details)