SQL & PL/SQL

Hi,
I have created a trigger on my transaction table. When a service is booked it is being inserted into two seperate tables. It is working fine, but at some times I am getting following error while recording the transactions.

ORA-06519 Active autonomous transactions detected and rolled back.

Following is the trigger code:

create or replace trigger glstrip_audit
after INSERT or update ON jeevadb.ipservice
for each row
declare
pragma autonomous_transaction;
nurstcode pbswardmast.nurstcode%type;
roomno pbsipregist.currroomno%type;
BEGIN

select b.nurstcode,a.currroomno into nurstcode,roomno from pbsipregist a,pbswardmast b where a.currroomno=b.wardno and a.regno=:new.ipno;

if :new.servcode='006013' then

if inserting then
insert into phindenthd(indentno,indentdate,indenttime,regno,storecd,nurstcode,doctcode,userid,edituser,editdate,status)
values (:new.servslno,:new.servdate,:new.servtime,:new.ipno,'94',nurstcode,:new.orderedby,:new.createdby,:new.editedby,:new.editedon,'P');
insert into phindentdt(indentno,itecode,indentqty)
values (:new.servslno,'OPTGS01',:new.servqty);

elsif updating then

update phindenthd set indentno=:old.servslno,indentdate=:old.servdate,indenttime=:old.servtime,regno=:old.ipno,
storecd='94',nurstcode=nurstcode,doctcode=:old.orderedby,userid=:old.createdby,edituser=:new.editedby,editdate=:new.editedon,status='P'
where regno=:old.ipno and indentno=:old.servslno;
update phindentdt set indentno=:old.servslno,itecode='OPTGS01',indentqty=:new.servqty where indentno=:old.servslno;

end if;
end if;
end;

can you help me in finding the problem?

thanks
satya