Debit Memo Adjustment against invoice

[akumar.oracle]

Hi
I am trying to adjust a debit memo against invoice.

using Transaction -> Transaction in AR i created a invoice (invoice# 227)
for a amount of 1,00,000.
Payment Term of 15/25/30

then i created a debit memo (debit memo# 471) of total amount 10,000.

then i query back the invoice and in More tab in Cross Reference i entered 471

and saved it

but when seeing Transaction -> Transaction Summary
i see no change.

Am i doing right thing?

what and where should i look for the change?

thanks

regards
Arvind