it seems that you have not opened a correct configuration file. To verify this, can you please give me the whole path of the file you tried to open?
I suggest that you opened a wrong file. Since the newest version we work with includes to avoid redundances in the configuration files. As consequence there are several confguration files (in the folder includes) which cannot be opened by their own, but are used in other files. The default configuration file to use is the config/dht.xml.
I hope that helps you!