Can't select stored procedure OUT param from Query Browser

[David Sadler]

Calling the SP (with IN and OUT params) and selecting back the OUT param from the MySQL Command Line Client works as expected.

Calling the SP (with IN and OUT params) and selecting back the result from the MySQL Query Browser does not work as expected. The select result is always NULL.
_________________________________
FROM THE Command Line Client ...

mysql> call sp_project_count(1,@p_count);
Query OK, 0 rows affected (0.00 sec)

mysql> select @p_count;
+----------+
| @p_count |
+----------+
| 4 |
+----------+
1 row in set (0.00 sec)

The select returns the expected value.

____________________________________
FROM THE Query Browser ...

call sp_project_count(1,@p_count);
SELECT @p_count;

The select returns a NULL.

The online SQL Query Browser documentation does not show an example of calling a procedure with IN and OUT params and then selecting back the OUT param.

What am I doing wrong from the Query Browser?

Thanks,
David