Rails - Jul 2005 - StatementInvalid -> Stack level too deep

I''d appreciate any help anyone can give me.  I get this same message on
create and update:


<< Error Message >>
ActiveRecord::StatementInvalid in Admin/employees#update 
stack level too deep: SELECT * FROM locations WHERE locations.id = 1 
LIMIT 1
/app/controllers/admin/employees_controller.rb:39:in `update''


<< Admin::EmployeesController excerpt >>
  def new
    @locations = Location.find_all
    @departments = Department.find_all
    @employee = Employee.new
  end

  def create
    @employee = Employee.new(params[:employee])
    if @employee.save
      flash[:notice] = ''Employee was successfully created.''
      redirect_to :action => ''list''
    else
      render :action => ''new''
    end
  end

  def edit
    @locations = Location.find_all
    @departments = Department.find_all
    @employee = Employee.find(params[:id])
  end

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


<< Employee Model >>
class Employee < ActiveRecord::Base
  belongs_to :department
  belongs_to :location
  has_many :versions
  belongs_to :role
  validates_associated :location, :department, :role, :versions
  validates_length_of :first, :within => 1..50
  validates_length_of :last, :within => 1..50
  validates_length_of :resp, :maximum => 3
  validates_format_of :resp_before_type_cast, :with => /([0-9]+)/,
:message=>"Only numbers are allowed in this field."
  validates_length_of :office, :within => 0..13
  validates_length_of :cell, :within => 0..13
  validates_length_of :title, :within => 0..50
  validates_format_of :notary_before_type_cast, :with => /[01]/,
:message=>"Must be a 0 or 1."
  validates_format_of :active_before_type_cast, :with => /[01]/,
:message=>"Must be a 0 or 1."
  end


I''m not sure if its related, but another problem I''m having is
that my
"resp" field, which is set with a maximum of 3 characters,
won''t accept
a 3 character entry.  The only way to get it to accept it is to change
the model to :maximum => 4.  But then it changes whatever I enter into
my resp field into "127".
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