Collection proxy don't work

[蔡博至]

Hi!
    I use the Jakarta OJB 1.0-rc3 to implement my AP successfully, but when I try to 
upgrade rc3 -> rc5, I get some problem.
The hugest problem is that the collection attribute is set proxy="ture" can not work. 
Dose anybody know why it is? How can
I do any change to let it work again??
    Please help me , thanks a lot.

ps.I have changed the collection-class="org.apache.ojb.odmg.collections.DListImpl_2".