delta changes for address are not reflecting from ECC to CRM

Hi Gurus,

We are using ecc and crm 6.We have completed the initial download of customers from ecc to crm.AFter this when we do any changes to the customers in ecc then theses changes are also reflecting into CRM.But when we do the changes for address of the customer then these changes are not reflecting in CRM.But BDOC is generating with the updated address.Please let me know how to debug this issue from BDoc.

Thanks,

kiran