The creator CSScript got back to me and gave me some pointers. It turned out that I was missing a semicolon. D'OH!

Anyways, I have stuff now loading from the ruleset XML files. The primary and secondary stats are now loading. I'm using a C# class with LINQ To XML to load them. I will now concentrate on writing more parsers for the rest of the test data that I have for GURPS Lite. The next step is to create code structures to propagate this data up to Entities, both Players and NPC/Mobs.