We were using CCME 3.x on our router with no problems.
Then we had the idea to upgrade CCME to version 4.0(3) and the IOS to version 124-4.XC4; lot of problems started to appear.
First of all now we are not able to transfer calls between different lines: we use 7940 and 7960 phones.
When we try to do it, the message "Unable to transfer call" appears; as I said before, using CCME 3.x we had no problems.
We've tried to change the transfer-system from full-consult to full-blind, but nothing changed.
Moreover, the call park stopped to work also.
I've attached an extract of the configuration.
Thanks a lot.