asp.net mvc - durandal.js Sort by header issue -

i using durandal data grid rendering, clicking on columns header should sort result. problem having problem if there more 1 page data result, when click on next page, sorted result normal. please assist. thanks,

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    var searchterm = ko.observable("");     var pagination = { current: ko.observable(1), pages: ko.observablearray() };     var sortables = {         barcode: {             id: ko.observable('barcode'),             active: ko.observable(true),             asc: ko.observable(true)         },         itemcode: {             id: ko.observable('barcodemap.item.code'),             active: ko.observable(false),             asc: ko.observable(true)         },         description: {             id: ko.observable('barcodemap.item.description'),             active: ko.observable(false),             asc: ko.observable(true)         },         quantity: {             id: ko.observable('quantity'),             active: ko.observable(false),             asc: ko.observable(true)         },         store: {             id: ko.observable('store.name'),             active: ko.observable(false),             asc: ko.observable(true)         },         fixture: {             id: ko.observable('fixture'),             active: ko.observable(false),             asc: ko.observable(true)         },         count: {             id: ko.observable('count'),             active: ko.observable(false),             asc: ko.observable(true)         },         createdby: {             id: ko.observable('createdby'),             active: ko.observable(false),             asc: ko.observable(true)         },         datecreated: {             id: ko.observable('datecreated'),             active: ko.observable(false),             asc: ko.observable(true)         }     };     var filters = { store: ko.observable(null), count: ko.observable(null), user: ko.observable(null), fixture: ko.observable(null) };      var items = ko.observablearray();     var activate = function () {         if (appsecurity.user().isauthenticated) {            pagination.current(1); pagination.pages([]); // reset pagination            return repo.getremote("stockid, barcode", breeze.predicate.create("barcode", breeze.filterqueryop.equals, null), pagination.current())                         .then(function (obj) {                             items(obj.data);                            setpages(obj.inlinecount);                                 });                      }         else             return q.resolve();     };             var sort = function (id) {         (var key in sortables) {             sortables[key].active(false);         }         var sortable = sortables[id];         sortable.active(true);         sortable.asc(!sortable.asc());         if (items().length > 0) {             var local = repo.getlocally(sortable.id().concat(sortable.asc() ? "" : " desc"), getpredicate(), pagination.current());             if (local.length > 0)                  return items(local);         } 

};

  var changepage = function (page) {         if (!indicator.isloading() && (page >= 1 && page <= pagination.pages().length && page != pagination.current())) {             indicator.isloading(true);             pagination.current(page);             ko.utils.arrayforeach(pagination.pages(), function (item) {                 if (item.page() == page)                     item.active(true);                 else                     item.active(false);             });             return repo.getremote("stockid, barcode", getpredicate(), pagination.current()) //[ch]                         .then(function (obj) {                             indicator.isloading(false);                             items(obj.data);                         });         }     };