[TxMt] rubymate won't run

[Sam Luther]

Hello,
I'm trying to run a ruby script and get this error:
/Users/sam/Library/Application Support/TextMate/Bundles/Ruby.tmbundle/ 
Support/RubyMate/run_script.rb:1:in `require': no such file to load  
-- /Applications/TextMate.app/Contents/SharedSupport/Support/lib/tm/ 
executor (LoadError) from /Users/sam/Library/Application Support/ 
TextMate/Bundles/Ruby.tmbundle/Support/RubyMate/run_script.rb:1

any idea what might have gone wrong here, I've run scripts plenty of  
times in the past no problem
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