deadlock problem

hi,
I found a deadlock on 2 queries, DELETE and REINDEX TABLE

DELETE waits for RowExclusiveLock on table address_jd
and
REINDEX waits for AccessExclusiveLock on PRIMARY KEY address_jd_pk

log:
Mar 19 00:30:53 ch08bl09 postgres[25576]: [5-1]
host=10.0.5.144,user=ppstat,db=ppstat ERROR: deadlock detected
Mar 19 00:30:53 ch08bl09 postgres[25576]: [5-2]
host=10.0.5.144,user=ppstat,db=ppstat DETAIL: Process 25576 waits for
RowExclusiveLock on relation 16613 of database 16388;
Mar 19 00:30:53 ch08bl09 postgres[25576]: [5-3] blocked by process 26649.
Mar 19 00:30:53 ch08bl09 postgres[25576]: [5-4] Process 26649 waits
for AccessExclusiveLock on relation 17776 of database 16388; blocked by
process 25576.
Mar 19 00:30:53 ch08bl09 postgres[25576]: [5-5]
host=10.0.5.144,user=ppstat,db=ppstat CONTEXT: SQL statement "DELETE FROM
dsa_nas.address_jd WHERE exp_id = 7"
Mar 19 00:30:53 ch08bl09 postgres[25576]: [5-6] PL/pgSQL
function "delete_export" line 16 at EXECUTE statement
Mar 19 00:30:53 ch08bl09 postgres[25576]: [5-7] SQL statement "SELECT
transform_functions.delete_export('dsa_nas', $1 )"
Mar 19 00:30:53 ch08bl09 postgres[25576]: [5-8] PL/pgSQL
function "transform_nas" line 152 at PERFORM
Mar 19 00:30:53 ch08bl09 postgres[25576]: [5-9]
host=10.0.5.144,user=ppstat,db=ppstat STATEMENT: SELECT
transform_functions.transform_nas(7)
Mar 19 00:30:57 ch08bl09 postgres[26649]: [3-1]
host=[local],user=postgres,db=ppstat LOG: duration: 865522.949 ms
statement: REINDEX TABLE dsa_nas.address_jd

where can be problem?

thanks,
tashunko