Change diagram connectors from code failed.

[ami]

Hi,
 
I'm trying to remove element from diagram.
lets say that I have a path diagram (like a linked list) inside an array,
and I want to remove one element in place "index".
this code from some reason wont do the job:

                for (short i = 0; i < List[index - 1].Connectors.Count; i++)// connecting to the next in list
                {
                    if (((Connector)List[index - 1].Connectors.GetAt(i)).SupplierID == List[index].ElementID)// if the connector is pointing to element to remove
                    {
                        ((Connector)List[index - 1].Connectors.GetAt(i)).SupplierID = List[index + 1].ElementID;// skip and connect to next one

                        ((Connector)List[index - 1].Connectors.GetAt(i)).Update();

                        List[index - 1].Connectors.Refresh();

                        break;
                    }
                }
                for (short i = 0; i < List[index].Connectors.Count; i++)// removing connector pointing out FROM selected activity
                {
                    if (((Connector)List[index].Connectors.GetAt(i)).ClientID == List[index].ElementID)
                    {
                        List[index].Connectors.DeleteAt(i, true);// delete the connector pointing out from selected element

                        break;
                    }
                }


the idea is to skip the selected element and to connect the previous to the next.
why it's not working?