APEX

I have this query on a apex report:

select APEX_ITEM.TEXT(1, ATRIBUTO, 30) "Attributes"
,ATRIBID
,VALOR "Actual Value"
,APEX_ITEM.SELECT_LIST_FROM_QUERY(2
,ATRIB_VLR_ID
,'select VALOR
,ID
from ATRIBBVAL
where ATRIB_ID = ' || ATRIBID||'
order by valor') "Answers"
from APEX_TEMP
where PRODUCT = :P3_PRODUCT
and APP_SESSION = :APP_SESSION;

I have a lot of products that que query executes perfectlly.
But i have too a group of products that when i want to execute, it gives the error:

report error:
ORA-06502: PL/SQL: numeric or value error: character string buffer too small

When i reduce the number of answer rows (vide example bellow) in the SELECT_LIST_FROM_QUERY the error does not occours.

select APEX_ITEM.TEXT(1, ATRIBUTO, 30) "Attributes"
,ATRIBID
,VALOR "Actual Value"
,APEX_ITEM.SELECT_LIST_FROM_QUERY(2
,ATRIB_VLR_ID
,'select VALOR
,ID
from ATRIBBVAL
where ATRIB_ID = ' || ATRIBID||'
and rownum <= 90
order by valor') "Answers"
from APEX_TEMP
where PRODUCT = :P3_PRODUCT
and APP_SESSION = :APP_SESSION;

Any sugestion to help me?

The apex i'm using in this case is 3.2.1 and the database 11.2.0.1.0.