protected void PreviousSink(System.UInt32 InstanceID)
{
if (ID_Table.ContainsKey(InstanceID) == false)
{
throw(new UPnPCustomException(802, InstanceID.ToString() + " is not a valid InstanceID"));
}
else
{
AVConnection c = (AVConnection)ID_Table[InstanceID];
c.Previous();
}
}