jQuery Grid Plugin - jqGrid

I have the navgrid edit pager working to select a row and display the Edit Dialog box.  It also goes out to my Servlet and executes correctly.  In my servlet, I am checking for duplicate updated values and throwing an exception.  The exception displays inside the Edit box and at this point the "Submit" and "Cancel" buttons dissappear.   This prevents me from canceling the operation, so my only option is to Close the Dialog box by clicking the "X" in the corner.

However, when I select another row to edit, the dialog box re-appears without a "Submit" or "Cancel" button.  Here is my Grid Definition:

    $("#driverXRefTable").jqGrid({
        datatype:"local",
        repeatitems: false,
        colNames:['Driver Name', 'SV Id', 'Nascar Id', '', '', ''],
        colModel:[
            {name: 'driverName', index:'driverName', editable:false, editoptions:{readonly:true,size:250}, width: 250, align: 'right'},
            {name: 'driverSVID', index: 'driverSVID', editable: true, editoptions:{size:25}, width: 150, align: 'right'},
            {name: 'driverNascarId', index: 'driverNascarId',editable: true, editoptions:{size:25}, width: 150, align: 'right'},
            {name: 'oldDriverSVID', index: 'oldDriverSVID', hidden: true, editable: true, editrules: {edithidden: false}},
            {name: 'oldDriverNascarId', index: 'oldDriverNascarId', hidden: true, editable: true, editrules: {edithidden: false}},
            {name: 'testDriverName', index: 'testDriverName', hidden:true, editable: true, editrules: {edithidden: false}}
        ],
        multiselect: false,
        rowNum:10,
        rowList:[10,20,30],
        pager: '#driverXRefPgr',
        editurl: "/racemonitor?cmd=updateDriverXref",
        viewrecords: true,
        caption: "Driver Xref",
        width: 600,
        height: "100%"
    });    
    $("#driverXRefTable").jqGrid('navGrid', '#driverXRefPgr',
           {}, //options
        {height:120,
         editCaption: "Edit Driver XRef",
         reloadAfterSubmit:false,
         closeAfterEdit: true
        }, // edit options
        {height:120,reloadAfterSubmit:false}, // add options
        {reloadAfterSubmit:false}, // del options
        {} // search options
        );

Is there something more I should do after this to clear out after this after getting a return error?