jQuery Grid Plugin - jqGrid

I'm using the following to export my current grid state:

$("#tableall").jqGrid('jqGridExport',{exptype:"jsonstring"});

If I print this to an alert or innerhtml div I see my current grid configuration listed in JSON form.

If I attempt to import this by doing the following ( these actions are tied to a button on my page ) :

test_json = $("#tableall").jqGrid('jqGridExport',{exptype:"jsonstring"});

$("#tableall").jqGrid('GridUnload');

$("#tableall").jqGrid('jqGridImport',{imptype:"jsonstring", impstring: test_json, jsonGrid:{ config:"grid",data: "data"} });

I get a "ReferenceError: Can't find variable: grid" error in the javascript debugging console. I'm thinking the error is saying it can't find "grid",  which is the root of my export in the json string. Everything looks right when I output the value of test_json . Do I need to change up my import line or possibly do something with the output of 'jqGridExport' before I can import it using 'jqGridImport'? I'm using jqGrid-3.7.2  with jquery jquery-1.4.2 . Thank you for the help.