NoMethodError in Logins#new

Showing app/views/logins/_new.html.erb where line #13 raised: 

You have a nil object when you didn't expect it!
The error occurred while evaluating nil.email

Extracted source (around line #13): 

10: <%= f.check_box :remember_me %>
11: <%= f.submit 'Log in' %>
12: <tr><td>&nbsp;</td></tr>
13: <tr><td></td><td><%=link_to "Lost password?", lost_password_login_url(:email => @login.email), :class=>'white_submit'%></td></tr>
14: <tr><td>&nbsp;</td></tr>
15: <tr><td></td><td><%=link_to "REGISTER FREE", new_user_url(:user => {:email => @login.email}), :class=>'white_submit' %></td></tr>
16: <%end%>

Trace of template inclusion: app/views/logins/new.html.haml

RAILS_ROOT: /Users/tamc2/Documents/NMK/feb-28-upgrade

Application Trace | Framework Trace | Full Trace 
/Users/tamc2/Documents/NMK/feb-28-upgrade/app/views/logins/_new.html.erb:13:in `_run_erb_app47views47logins47_new46html46erb_locals_new_object'
lib/nmk_form_helper.rb:33:in `nmk_form_for'
/Users/tamc2/Documents/NMK/feb-28-upgrade/app/views/logins/_new.html.erb:6:in `_run_erb_app47views47logins47_new46html46erb_locals_new_object'
/Library/Ruby/Gems/1.8/gems/haml-2.0.6/lib/haml/helpers/action_view_mods.rb:12:in `render'
/Library/Ruby/Gems/1.8/gems/haml-2.0.6/lib/haml/helpers.rb:57:in `non_haml'
/Library/Ruby/Gems/1.8/gems/haml-2.0.6/lib/haml/helpers/action_view_mods.rb:12:in `render'
/Users/tamc2/Documents/NMK/feb-28-upgrade/app/views/logins/new.html.haml:1:in `_run_haml_app47views47logins47new46html46haml'
/Library/Ruby/Gems/1.8/gems/haml-2.0.6/lib/haml/helpers/action_view_mods.rb:14:in `render'
/Library/Ruby/Gems/1.8/gems/haml-2.0.6/lib/haml/helpers/action_view_mods.rb:14:in `render'
/Library/Ruby/Gems/1.8/gems/haml-2.0.6/lib/sass/plugin/rails.rb:19:in `process'

Request

Parameters: 

None

Show session dump

Response

Headers: 

{"Content-Type"=>"text/html",
 "Cache-Control"=>"no-cache"}