FilterEditor of ListGrid problem

[serdaroquai]

ListGrid lg = new ListGrid();
lg.setDataSource(ds); // ds is set to be ClientOnly(true)
lg.setShowFilterEditor(true);
lg.setFilterOnKeypress(true);

// ..Creating records and placing them in ListGridRecord[] called recordArray

lg.setRecords(recordArray);

Listgrid works fine but when I use filter editor to filter records, it is always "no items to show". when I delete what I type I can't see my records anymore as well. What am I missing here? Thanks