Reg the upload of customer master data thru BDC

Dear Friends,

When i am uploading data thru BDC, i am unable to find email and house number fields thru recording.

But I am able to create a customer thru XD01 txn code with email(SMTP_ADDR) and house number(HOUSE_NUM1)).

How can i find these fields thru recording or how can i upload these two fields also.

Please help.

Regards,

S.Vinod