It literally worked one time, now I just get array errors.

I am trying to submit from a usercontrol that is being hosted by a smartpart.
My code is:
PickerEntity entity = myPeopleEditorControl.Entities[0] as
PickerEntity;
Hashtable peopleEditorData = entity.EntityData;

SPUser SelectedUser = null;
SelectedUser =
SPContext.Current.Web.SiteUsers.GetByID(Convert.ToInt16(Convert.ToString(peopleE\
ditorData["SPUserID"])));

listItem["user"] = SelectedUser;
I am just hoping someone see's something I don't here.