Coexistence with OCS R2 server problem to my computer

I have setup coexistent with OCS R2 server to my computer. It is creating problem to my computer.
The time when I make a Lync client to connect via our old OCS Server, the GAL can be downloaded with pictures but when I make connection through the new Lync server I get "cannot download address book and no pictures.
What is going on?
