I think we just had a pop quiz in "mechanics of investing" class and we failed. It looks a though there is a rule concerning the size of an order which is preventing your buy from being reflected.
REPLY FROM TD WATERHOUSE
For any stock a round lot is 100 shares. As far as reflection, a minimum of 100 shares is needed with the exception of an otc bulletin board or pink sheet stock. If a penny stock is trading between .00 and .50, you need to have 5000 shares to be reflected. Between .51 and 1.00, 2500 shares is needed to be reflected.