Combining data from 2 XML fields into 1 Text Box

programming flash
1

I have loaded an XML file and I am populating several text fields with the data. For the first name and last name fields, I would like to combine the data into one field for appearance sake, but for some reason, only the first name data is appearing when I run it. It seems to be truncating the last name. My code looks like this:

Obj.Name.htmlText = xmlFile.name.first + xmlFile.name.last;

Do I have some syntax wrong? Is concatenation allowed in AS3?

Thanks