Repopulating LOV with Record group created at runtime

[Jennifer Bhamoo]

Hello~
I'm trying to repopulate an LOV with a new record group created at runtime.
What I have working:
Created LOV and initial record group with LOV wizard. (just something basic: select department_id, department_name from department).
Created a button on my form with a when-button-pressed trigger to display this LOV.
ok, now I created a second button with a when-button-pressed trigger and this is where I am trying to create a new record group using create_group_from_query and then populate the above mentioned lov with this new record group using set_lov_property built-in.
Here's my code:

declare
bln_lov boolean;
vc_dept2 varchar2(14) := 'Department 2';
rg_dept2 RecordGroup;
n_pop_rg number;
begin
rg_dept2 := create_group_from_query(vc_dept2, 'select department_id, department_name from department where department_id=2');
n_pop_rg := populate_group(vc_dept2);
set_lov_property('lov_dept', GROUP_NAME, vc_dept2);
bln_lov := show_lov('lov_dept');
message('show lov');
end;

(I realize this doesn't have any practical sense, I am just trying to learn.)
I don't know where I am going wrong. This code compiled fine, and I tested the select statement, and it returned a department. The error I am receiving is "Cannot Create group Department 2".
Thank you for any tips/suggestions.
[ June 19, 2002: Message edited by: Jennifer Bhamoo ]

[Jennifer Bhamoo]

Bueller....
Bueller....

No one can assist me? hints?
I've read the help in Form Builder on all the built-ins, and it appears I am doing everything fine. Based on my readings, you can repopulate an LOV with a record group, and the record group I'm using has the same structure as the initial rg, so that can't be the problem there. I'm still stumped.