尽管执行成功，ExecuteNonQuery仍然返回-1

I'm running an asp.net 2.0 web application. Suddenly this morning, ExecuteNonQuery started returning -1, even though the commands in the SP that ExecuteNonQuery is running, are executing (I see items inserted and updated in the DB), and there is no exception thrown.I'm running an asp.net 2.0 web application. Sud