Tkri

hi i am trying to use tkri but seem to be getting the following error,
does anyone have this working?

internal:lib/rubygems/custom_require:29:in require': no such file to load -- tk (LoadError) from <internal:lib/rubygems/custom_require>:29:inrequire’
from
/usr/local/lib/ruby/gems/1.9.1/gems/tkri-0.9.5/lib/tkri.rb:9:in <top (required)>' from <internal:lib/rubygems/custom_require>:29:inrequire’
from internal:lib/rubygems/custom_require:29:in require' from /usr/local/lib/ruby/gems/1.9.1/gems/tkri-0.9.5/bin/tkri:11:inrescue in
<top (required)>’
from
/usr/local/lib/ruby/gems/1.9.1/gems/tkri-0.9.5/bin/tkri:3:in <top (required)>' from /usr/local/bin/tkri:19:inload’
from /usr/local/bin/tkri:19:in `’

appears you don’t have some “ruby tk” package or other installed?
-r