[web2py] Plugin_jqgrid problem

[leo]

Hi,everyone, i'm a newbie for web2py,I'm in trouble  when I use the
plugin_jqgrid. this is  my code:

my dbmodel:

db.define_table("data",
      SQLField("name", notnull=True, default=None),
      SQLField("date",notnull=True),
      SQLField("number", notnull=True, default=None),
      SQLField("later_times", "integer", default=None),
      SQLField("leave_early_times", "integer", default=None),
      SQLField("absenteeism_times", "integer",  default=None),
      SQLField("later_time",default=None),
      SQLField("leave_early_time", default=None),
      SQLField("work_time", default=None),
      SQLField("department",default=None),
      SQLField("description",default=None))


my controller:

  def index():

 
grid=plugin_jqgrid(db.All_work_data,columns=['id','name','date','number','later_times','leave_early_times','absenteeism_times','later_time','leave_early_time','work_time','department','description'],,col_width=75,height=600)
    return dict(grid=grid)



my view:
default/index.html

{{extend 'layout.html'}}

<h2> 1.all data </h2>
{{ =grid}}

<h2>2.all data </h2>
{{ =grid}}


I found just one grid display in my page when i run the code.
where is the problem?