scrubyt on rails EOFERROR

I'm using scrubyt on rails2.0.2 and development / running evironment is cygwin. 

Problem :

Everytime I run my extractor which is located lib and included in controller, 

it runs properly just once. From second time, I saw EOFError and 

I've searched scrubyt forum. and included this file in lib. 

----------------------------

usr/lib/ruby/1.8/net/protocol.rb:133:in `sysread'
/usr/lib/ruby/1.8/net/protocol.rb:133:in `rbuf_fill'
/usr/lib/ruby/1.8/timeout.rb:56:in `timeout'
/usr/lib/ruby/1.8/timeout.rb:76:in `timeout'
/usr/lib/ruby/gems/1.8/gems/http_configuration-1.0.2/lib/http_configuration.rb:23:in `timeout'

----------------------------

Why :

I've googled about this problem enough. The problem is not on rails, nor on ruby. It's mechanize. 

Here is the explanation about the bug.

Solve :

C:\cygwin\lib\ruby\gems\1.8\gems\scrubyt-0.3.4\lib\scrubyt\core\navigation\fetch_action.rb

I've added just one line to the fetch_action.rb

module FetchAction  

@@current_doc_url = nil  

@@current_doc_protocol = nil  

@@base_dir = nil  

@@host_name = nil  

@@agent = WWW::Mechanize.new  

@@history = []  

@@agent.keep_alive = false