[MacRuby-devel] control tower with objective-c class

Hi all, I'm experimenting with Control Tower and tought I would try to get it running with an Objective-C class, inside an imported framework, implementing the Rack protocol. My class imports right in macruby, has a proper call(env) method which returns an array of 3 elements, when I call inspect on it it is same, same same as the macruby one... but control tower doesn't display my return string??? any idea? L-P