sql_Trace and tkprof

Hi!
I executed tkprof to check the sql_trace stats but i got a zero row count against each step of the execution plan. The query returns 93 rows. Can anyone tell me why is there a zero row count?

Thx.

Umar Farooq Ch.

Misses in library cache during parse: 1 Optimizer goal: CHOOSE
Parsing user id: 121 (NWDB)

Rows Execution Plan

-------  ---------------------------------------------------
      0  SELECT STATEMENT   GOAL: CHOOSE
      0   HASH JOIN
      0    TABLE ACCESS (FULL) OF 'PERMANENT_POSITION_AWARD'
      0    HASH JOIN
      0     TABLE ACCESS (FULL) OF 'PILOT_PREFERENCE'
      0     HASH JOIN
      0      TABLE ACCESS (FULL) OF 'PILOT_TEMP_PREFERENCE'
      0      TABLE ACCESS (FULL) OF 'PILOT