Routes problem

Rails
1

Hi i configured custom routes but i got the following errors

Error Number 1:
You have a nil object when you didn’t expect it!
The error occurred while evaluating nil.to_sym

17:

<%=quipment.numero_activo_fijo%>
18: <%=quipment.direccion_mac%>
19: <%=quipment.numero_serie%>
20: <%= link_to ‘Show’, quipment %>
21: <%= link_to ‘Edit’, edit_equipment_path(quipment) %>
22: <%= link_to ‘Destroy’, quipment, :confirm => ‘Are you
sure?’, :method => :delete %>
23:

The thing is that quipment is defined. Here is the source code:

<% for quipment in @equipments %>

<%=quipment.numero_activo_fijo%> <%=quipment.direccion_mac%> <%=quipment.numero_serie%> <%= link_to 'Show', quipment %> <%= link_to 'Edit', edit_equipment_path(quipment) %> <%= link_to 'Destroy', quipment, :confirm => 'Are you sure?', :method => :delete %> <% end %>

Now if I remove the line 20, 21, 22 from the file i got error number 2
Error number 2:

undefined local variable or method `new_equipment_path’ for
#ActionView::Base:0x2aaaae5c3bf8

Here is the route for equipments

map.resources :equipment,
:singular=>:equipment_instance,
:collection =>{
:add_equipment => :get,
:index => :get
}

if i remove the :singular => xxx line the problem is solved but the new
methods give me errors

Thank you very much for the help