Uploding files

i am trying to upload the files for that i have used the below code.when
i try to upload i shows the error message that access denied for
c/rails/…/dump please kindly help me

controller:

class DocumentsController < ApplicationController
before_filter :login_required
model :user
after_filter OutputCompressionFilter

def index
new
render :action => ‘new’
end

#GETs should be safe (see
URIs, Addressability, and the use of HTTP GET and POST)
verify :method => :post, :only => [ :destroy, :new, :update ],
:redirect_to => { :action => :list }
def cancel
redirect_to :controller => ‘account/welcome’
flash[:notice] = ‘document not uploaded’
end

def new
if request.get?
@document = Document.new
else
@document = Document.new(params[:document])
begin
if @document.save
flash[:notice] = ‘document uploaded’
redirect_to :action => ‘list’
end
rescue
logger.error(“Error while saving document containing
‘#{@document.filename}’”)
if File.unlink(@document.dump_filename) == 1
logger.error(“Cleanup of ‘#{@document.dump_filename}’
successful”)
else
logger.error(“Cleanup of ‘#{@document.dump_filename}’ failed”)
end
flash[:notice] = ‘Internal error during upload.’
redirect_to :action => ‘list’
end
end
end
#def list
#@document_pages, @document = paginate :document, :per_page => 10
#end
def list
@document = Document.find(:all, :order => ‘uploaddate’)
end
#def view
#@user = get_user
#@pages = @user.pages
#@page = @pages.find(params[:id])
#end

def show
@document = Document.find(params[:id])
end

def edit
@document = Document.find(params[:id])
end

def update
@document = Document.find(params[:id])
if @document.update_attributes(params[:document])
flash[:notice] = ‘document was successfully updated.’
redirect_to :action => ‘show’, :id => @document
else
render :action => ‘edit’
end
end

def destroy
@document = Document.find(params[:id]).destroy
redirect_to :action => ‘list’
end
end

model:

class Document < ActiveRecord::Base
attr_accessible :description, :file
validates_presence_of :filename
has_and_belongs_to_many :bundles, :uniq => true
has_and_belongs_to_many :categories, :uniq => true

def file=(file_field)
@file = file_field
original_filename = file_field.original_filename
logger.info(“Original filename is ‘#{original_filename}’”)
self.filename = base_document_of(original_filename)
logger.info(“Sanitized filename is ‘#{self.filename}’”)

self.content_type = file_field.content_type.strip

end

def orginal_filename
end
def validate_on_create
if @file.size <= 0
errors.add_to_base(“File size is invalid”)
end
end

def before_create
filename = dump_filename
logger.info(“Uploading file to ‘#{filename}’”)
@file.rewind
File.open(filename, “wb”) do |f|
f.write(@file.read)
end
end

def dump_filename
# DUMP_PATH is set in config/environment.rb
File.expand_path(File.join(DUMP_PATH, “#{self.filename}”))
end

private
def base_document_of(filename)
filename = File.basename(filename.strip)
# remove leading period, whitespace and \ / : * ? " ’ < > |
filename = filename.gsub(%r{^.|[\s/\*:?'"<>|]}, ‘_’)
end
end