sharepoint list is not updated

hi all,

i have write some code to insert item into my sharepoint list. This is my code

SPList oList = oWeb.Lists["lists"];

SPListItem oSPItem = oList.AddItem();

oSPItem["item1"] = ITEM1id;
 oSPItem["item2"] = ITEM2id;
oSPItem.Update();

but my list is not showing any items being insert. Do you any other suggestion?.