No route matches? Should be simple

I keep running into an error that is becoming quite frustrating - I have a Mail setup t开发者_开发百科hat sends out an activation e-mail to new users.

I keep getting the error: no route matches {:controller => "activations", :action => "create"}

Here's the code:

# routes. I tried all of these individually.
match 'activations/create'
match 'activations/create/:activation_code' => 'activations#create', :as => :activate
match 'activate/:activation_code' => 'activations#create', :as => :activate

# controller. This is the line that refers to UserMailer, that then causes the error.
UserMailer.activation_instructions(@user).deliver

# UserMailer.rb
def activation_instructions(user)
  @user = user
  @account_activation_url = activate_url(user.perishable_token) # error raised here
  mail(:to => "#{user.login} <#{user.email}>", :subject => "Registered" )
end

What am I missing here?

Try

match 'activations/create(/:activation_code)' => 'activations#create', :as => :activate