Audit trigger

Hello,

LUW DB2 V8 FP13

I am trying to create audit triggers in order to find out which
user/application is deleting data from a table, as well as the
statement the user entered.

Here´s what I´ve done:

# create table AUD.T_BACKLOG_AUDIT (EVENT_TIME TIMESTAMP, USERNAME
VARCHAR(20), STATEMENT VARCHAR(251))

# CREATE TRIGGER TRG.TRACE_BACKLOG
  AFTER DELETE ON ASSET.TBL_BACKLOG
  FOR EACH STATEMENT MODE DB2SQL
  BEGIN ATOMIC

  insert into AUD.T_BACKLOG_AUDIT
    select current timestamp, current user,
SUBSTR(VARCHAR(STMT_TEXT),1,250)
    from TABLE(SNAPSHOT_STATEMENT('ASSET',-1)) as A,
TABLE(SNAPSHOT_APPL_INFO('ASSET',-1)) as B
    where A.AGENT_ID=B.AGENT_ID and APPL_ID=APPLICATION_ID()

 END;

But when regular users connect to the DB and execute a DELETE on
ASSET.TBL_BACKLOG, the following error message indicating lack of
privileges is returned:

SQL0723N  An error occurred in a triggered SQL statement in trigger
"TRG.TRACE_BACKLO".  Information returned for the error includes
SQLCODE
"-443", SQLSTATE "38553" and message tokens
"SNAPSHOT_APPL_INFO|*_APPL_INFO|SQL1092  Re".  SQLSTATE=09000

I do not wish to grant DB_ADM to this user. Event monitors are not an
option due to its overhead.

Any other way to achieve the same result? I want to audit delete
activity on a single table.

Thanks in Advance,