[Yaml-core] Derived from Hash, simple newbie question

[<tor...@fi...>]

Moi,

I've just switched from xml to yaml and it's great. I can actually read 
the output. And it works. Big wow !

The only thing is, I have a class derived from Hash and it has 2 
attributes. When I to_yaml it, the attributes don't print.

Any clues ?

Thanks
    Torsten