I get the following error when running the software on Debian Lenny

ruby1.8 fb_cleaner.rb

Facebook Cleaner v1.5 - Use at your own risk

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./lib/facebook.rb:140:in get_home': undefined methodemail=' for nil:NilClass (NoMethodError)
from (eval):12:in form_with' from ./lib/facebook.rb:139:inget_home'
from /usr/lib/ruby/gems/1.8/gems/mechanize-1.0.0/lib/mechanize.rb:262:in get' from ./lib/facebook.rb:137:inget_home'
from ./lib/facebook.rb:38:in `setup'
from fb_cleaner.rb:34