Ruby on Rails: Search Form - multiple search fields

I am trying to create an application that allows the user to search a
database. The search page layout would behave with some drop down menus
that would show data already in the database to narrow the search, and
also text boxes to allow the user to put in key words like the "project
name". I'm having a problem getting rails to take all the info that has
been entered in the search form, and performing one big search.

Here is part of my search layout:

    <%= form_tag search_path, :method => 'get' do %>

  <%= hidden_field_tag :direction, params[:direction] %>
     <%= hidden_field_tag :sort, params[:sort] %>
    <p>
    <%= text_field_tag :search, params[:search] %>
    <%= submit_tag "Search Project Name", :project_name => nil %>
    </p>
    <p>
    <%= text_field_tag :search, params[:search] %>
    <%= submit_tag "Search Client", :client => nil %>
    </p>
    <% end %>

Here is my index and search actions in the project controller:

    def index
  @projects = Project.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render :json => @projects }
     end
    end

    def search

    @project_search = Project.search(params[:search]).order(sort_column
+ ' ' + sort_direction).paginate(:per_page => 5, :page => params[:page])

    end

and here is part of my models/project.rb file

    def self.search(search)
    if search
      where('project_name LIKE ?', "%#{search}%") || where('client LIKE
?', "%#{search}%")
    else
      scoped
    end
    end

As you can see, I am just trying to search on either the project_name or
the client. If I can get this working, I will be extending it onto other
fields.

The functionality at the moment is that, when I try to search it both
boxes, it overwrites one, and only does one of the field searches.

I am new to ROR so hopefully someone can help. Any suggestions
will be appreciated.

Thanks in advance!

I have not looked at your code in detail but if you have a look at the
Rails Guide on Debugging you will find techniques that can help you
debug your code.

Colin