Distribution from CRM to ECC is failing

Hi,

We are on CRM 4.0.

Business Partner replication from CRM to ECC has abruptly stopped.

After some investigations we found out that RFC authorisation for ECC had failed (SM59). It has been corrected. But still BP's are not getting replicated to ECC.

In SMW01, these BP's are in Green state. There are no in/out bound queues in CRM neither ECC.

Can anyone inform why this could be happening. How do I check where distribution is failing.

Regards,

Rahul