Z field values are not coming to PI interface from CRM

Hi,

I am new to this functionality.Actually the data transfering from CRM to PI.

in the ChangeHistory of BPData getting transfered to PI interface, only standard field values are coming, but Z field values not coming.

is there any input how to test the data transfering while from crm to pi...

i found couple of Transaction codes SXI_MONITOR which will shows the xml message.

I am really to new this functionality.. pls provide any inputs to go further.

Thanks,

RamReddy