Lpc2000

Hi there, 
I'm trying to use the CAN Interface of the LPC2129 an have problems to
get started. It was easy to send and receive messages, but I just
can't find a way to deal with errors on the CAN Bus. So I would like
to find out:

1. What do I have to do to make the LPC stop sending a CAN message
contiously when it does not receive an ACK?
How can I find out that the LPC 2129 aborted sending a message because
it was not acknowledged?

2. When I add a second LPC2129 to my can bus with its Accepatance
Register tuned so that it will not accept the incoming message of
another LPC2129. The sending LPC stops sending after having sent only
one frame -just as if the CAN-message would have been accepted. What
do I have to do to stop this behaviour?

3. Is there any good documentation on the LPC2129s?

Thanks for your help