jquery spservices 'undefined'

function GetGroupOfUser(){
var curUser = $().SPServices.SPGetCurrentUser();
$().SPServices({
      operation: "GetGroupCollectionFromUser",
      userLoginName: $().SPServices.SPGetCurrentUser(),
      async: false,
      completefunc: function(xData, Status) {
        if($(xData.responseXML).find("Group[Name='ACC']").length == 1) {
alert("Hello");
		  var boolVal = "True";
alert(boolval);
        }
	else
        {
                  var boolval = "False";
alert(boolval);
        }
      }
   }); /*close().SPServices */
}