search for: ambiguousplaceexception

I have tried to create and use my own Exception class, AmbigouosPlaceException. I can''t seem to use my exception though, as I get the following FRUSTRATING error... ----- Error ----- uninitialized constant AmbiguousPlaceException C:/app/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:89:in `const_missing'' C:/app/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:120:in `const_missing'' C:/app/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3....