Instalé con éxito Sass, pero tengo problemas para importar Compass.

El siguiente es el detalle de error:

*Syntax error: File to import not found or unreadable: compass.
              Load path: H:/HTML/___keoFull/sass
.....
Backtrace:
mainKeo.scss:2
style.scss:2
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/import_node.rb:67:in `rescue in import'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/import_node.rb:45:in `import'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/import_node.rb:28:in `imported_file'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/import_node.rb:37:in `css_import?'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:217:in `visit_import'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/base.rb:37:in `visit'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:100:in `visit'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:227:in `block in visit_import'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:227:in `map'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:227:in `visit_import'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/base.rb:37:in `visit'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:100:in `visit'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/base.rb:53:in `block in visit_children'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/base.rb:53:in `map'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/base.rb:53:in `visit_children'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:109:in `block in visit_children'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:121:in `with_environment'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:108:in `visit_children'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/base.rb:37:in `block in visit'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:128:in `visit_root'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/base.rb:37:in `visit'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:100:in `visit'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/visitors/perform.rb:7:in `visit'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/tree/root_node.rb:20:in `render'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/engine.rb:315:in `_render'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/engine.rb:262:in `render'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/plugin/compiler.rb:341:in `update_stylesheet'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/plugin/compiler.rb:203:in `block in update_stylesheets'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/plugin/compiler.rb:201:in `each'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/plugin/compiler.rb:201:in `update_stylesheets'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/plugin/compiler.rb:235:in `watch'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/plugin.rb:107:in `method_missing'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/exec.rb:444:in `watch_or_update'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/exec.rb:307:in `process_result'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/exec.rb:41:in `parse'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/lib/sass/exec.rb:21:in `parse!'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.2.6/bin/sass:9:in `<top (required)>'*