jQuery Grid Plugin - jqGrid

Hello! I have a problem with subgrid. When i try to delete a row in one of subgrids the submit window is showed out of screen, at the bottom. So i think it was because of the wrong calculation the start position of this window. This bug happen when there was many subgrids in the grid. And as lower subgrid than lower this window showing. Below a code of my grid. I have a two grid on a page. Tested browsers: FF3.5.2, IE8.0.6xxx. Version of jqGrid: 3.4.4.

$(”#xxx_xxx”).jqGrid({
    url:”/xxx/xxx/xxx/”,
    datatype: “xml”,
    colNames:['â„–','xxx', 'xxx', 'xxx','xxx', 'xxx'],
    colModel:[
        {name:'id',index:'id', width:40, align:"center",editable:false},
        {name:'name',index:'name', width:390,editable:false},
        {name:'price',index:'price', width:60, align:"right",editable:false},
        {name:'cnt',index:'cnt', width:45, align:"right",editable:true},
        {name:'total',index:'total', width:70,align:"right",editable:false},
        {name:'zakup',index:'zakup', width:40,align:"center",editable:false}
    ],
    rowNum:20,
    rowList:[10,20,30,50,100],
    imgpath: '/js/jqGrid/themes/basic/images',
    pager: 'xxx_xxx_pager',
    sortname: 'name',
    viewrecords: 'true',
    multiselect: 'true',
    sortorder: “asc”,
    caption: 'xxx',
    height:'auto',
    width: winh,
    mtype:”POST”,
    editurl:”xxx”,
    toolbar: [true,"bottom"],  
 
});
jQuery(”#xxx_xxx2″).jqGrid({
    url:”xxx”,
    datatype: “xml”,
    colNames:[ 
    'xxx',  
    'xxx'  
    ],
    colModel:[    
        {name:'name',index:'name', width:460,editable:false}, 
        {name:'total',index:'total', width:80,align:"right",editable:false}  
    ],
    rowNum:20,
    rowList:[10,20,30,50,100],
    imgpath: '/js/jqGrid/themes/basic/images',
    pager: 'xxx_xxx_pager2',
    sortname: 'name',
    viewrecords: true,
    //multiselect: true,
    sortorder: “asc”,
    caption:'xxx',
    height:'auto',
    width:winh+16,
    mtype:”POST”,
    editurl:”xxx”,
    toolbar: [true,"bottom"],
    subGrid: true,
    subGridRowExpanded: function(subgrid_id, row_id) {
    row_id_exp = row_id;
    var subgrid_table_id;
    subgrid_table_id = subgrid_id+”_t”;
    pager_id = “p_”+subgrid_table_id;
    expanded_table_name = “#”+subgrid_table_id;
    jQuery(”#”+subgrid_id).html(”<table id='”+subgrid_table_id+”' class='scroll'></table><div id='”+pager_id+”' class='scroll'></div>”);
      jQuery(”#”+subgrid_table_id).jqGrid({
        url:”xxx”,
        datatype: “xml”,
        colNames: [
         'xxx'
        'xxx',
        'xxx', 'xxx',
        'xxx'
       ,'xxx'
        ],
        colModel: [
          {name:'id',index:'id', width:40, align:"center",editable:false},
          {name:'name',index:'name', width:300,editable:false},
          {name:'price',index:'price', width:60, align:"right",editable:false},
          {name:'cnt',index:'cnt', width:45, align:"right",editable:true},
          {name:'total',index:'total', width:70,align:"right",editable:false}
         ,{name:'zakup',index:'zakup', width:0,align:"center",editable:false}
                  ],
        height: “100%”,
        width: winh-40,
        rowNum: 20,
        pager: pager_id,
        mtype:”POST”,
        multiselect: true,
        imgpath: '/js/jqGrid/themes/basic/images',
        sortname: 'name',
        sortorder: “asc”,       
        editurl:”xxx”
     }).navGrid(”#”+pager_id,{
    del:true,  
    edit:false,
    add:false,
    search:false,
    view:false
    });
 },   
jQuery(”#xxx_xxx”).navGrid('#xxx_xxx_pager',{
  addfunc: function() {
     edit_smeta(1);
     return true;
    },
  del:true,
  edit:false,
  search:false,
  view:false,
  refresh: false
  },
{reloadAfterSubmit:true},
{reloadAfterSubmit:true},
{reloadAfterSubmit:true}).navButtonAdd('#xxx_xxx_pager',{
        caption:””, buttonimg:”/js/jqGrid/themes/basic/images/refresh.gif”, onClickButton: function(){
        jQuery(”#xxx_xxx”).trigger(”reloadGrid”);
        jQuery(”#xxx_consist2″).trigger(”reloadGrid”);
        }, position:”last”
        });

jQuery(”#xxx_xxx2″).navGrid('#xxx_xxx_pager2',{
  del:false,
  edit:false,
  search:false,
  view:false,
  refresh:false
  },
{reloadAfterSubmit:true},
{reloadAfterSubmit:true},
{reloadAfterSubmit:true});
});