2.1 EA2 does not display query results, query works fine in sqlplus

Question

2.1 EA2/Windows XP 32-bit
The following query does not show any results for Total(GB) and Free(GB) columns. The diskgroup name shows correctly.
SELECT
DG.name ,
ROUND(SUM(DSK.TOTAL_MB)/1024,2) "Total (GB)",
round(SUM(DSK.FREE_MB)/1024,2) "Free (GB)"
FROM
V$ASM_DISK DSK,
V$ASM_DISKGROUP DG
WHERE
DSK.GROUP_NUMBER=DG.GROUP_NUMBER
group by DG.name;
The query works fine when run from SQL*Plus:
SQL> SELECT
2 DG.name ,
3 ROUND(SUM(DSK.TOTAL_MB)/1024,2) "Total (GB)",
4 round(SUM(DSK.FREE_MB)/1024,2) "Free (GB)"
5 FROM
6 V$ASM_DISK DSK,
7 V$ASM_DISKGROUP DG
8 WHERE
9 DSK.GROUP_NUMBER=DG.GROUP_NUMBER
10 GROUP BY DG.name;
NAME Total (GB) Free (GB)
DG1 707.98 162.32
DG2 134.84 122.68
SQL>
This must be something unique to SQLDeveloper. I tested in 2.1 EA1 and 1.5.5.59.69 and the query does not show results for the Total (GB) and Free (GB) columns.

Answer 1

I would like to update the problem. It seems like when SQLDeveloper is connected to ASM instance, it has trouble using the divide operator (/). For example, the following query works fine:
SELECT
name,
TOTAL_MB
FROM
V$ASM_DISKGROUP;
But if I try to divide the TOTAL_MB by any number, the column shows blank (the column is blank, not NULL). So, if I try to run the following query, the output will just display diskgroup names. The TOTAL_MB/1024 column shows blank.
SELECT
name,
TOTAL_MB/1024
FROM
V$ASM_DISKGROUP;
If I run the same query in SQL*Plus from the same desktop using the same TNS alias, it works just fine which tells me that it is a SQLDeveloper problem.
When I am connected to a regular database, then the problem does not show up and SQLDeveloper is able to display the results even when I am using the divide operator (/).