Materialized View (Fast Refresh) How to?

[cmmrfrds]

I am trying to make a materialized view fast refreshable. It works for inserts on the base table but not for deletes and updates.

Here is the code to create the MV Log.
CREATE MATERIALIZED VIEW LOG ON commerfj.tdl_test
WITH ROWID,
PRIMARY KEY,
SEQUENCE (TX_ID,DETAIL_TYPE,POST_DATE,AMOUNT,PATIENT_AMOUNT,INSURANCE_AMOUNT,ORIGINAL_PAYOR_ID,CUR_PAYOR_ID)
INCLUDING NEW VALUES;

Here is the base table description.
CREATE TABLE COMMERFJ.TDL_TEST
(
TDL_ID NUMBER(16) NOT NULL,
TX_ID NUMBER(38),
POST_DATE DATE,
DETAIL_TYPE NUMBER(38) NOT NULL,
AMOUNT NUMBER(12,2),
PATIENT_AMOUNT NUMBER(12,2),
INSURANCE_AMOUNT NUMBER(12,2),
ORIGINAL_PAYOR_ID NUMBER(38),
CUR_PAYOR_ID NUMBER(38)
)

Here is the MV query.
select
tx_id,
min(rowid) as test_rowid,
min(tdl_id) as tdl_id,
max(case when detail_type = 1 then post_date else null end) as post_date,
sum(amount) as amount,
sum(patient_amount) as patient_amount,
sum(case when detail_type in (20) then amount else 0 end) as payment_amount,
sum(case when detail_type in (21) then amount else 0 end) as adj_amount,
sum(case when detail_type in (1,40,41) then insurance_amount else 0 end) as insurance_amount,
count(amount) as cnt_amt,
count(patient_amount) as cnt_pat,
count(case when detail_type in (20) then amount else 0 end) as cnt_payamt,
count(case when detail_type in (21) then amount else 0 end) as cnt_adj,
count(case when detail_type in (1,40,41) then insurance_amount else 0 end) as cnt_ins,
min(original_payor_id) as original_payor_id,
max(cur_payor_id) as cur_payor_id,
count(*) as cnt
FROM commerfj.tdl_test
group by
tx_id

When I try a delete on the base table, I an error.
ORA-32314: REFRESH FAST of "COMMERFJ"."MV_TDL_TEST" unsupported after deletes/updates.

Can somebody help me get this to work. Thank you.