Register users using a procedure and page process

Question

I have the procedure written and the md5 function written along with the page process these all work fine but the password hash does not get entered into the user_repository everything else does but the password hash i wasnt getting a error before but now im getting the follow error
Action Processed.
ORA-28231: no data passed to obfuscation toolkit
The registered Procedure is as follows
create or replace procedure register_user
(p_username in varchar2, p_password in varchar2, p_forename in varchar2, p_surname in varchar2, p_email in varchar2, p_admin in char, p_locked_flag in char) is
v_hash varchar(32);
begin
v_hash := md5hash(upper(p_username) || p_password);
insert into user_repository
(username, forename, surname, email, admin, password_hash, locked_flag)
values
(p_username, p_forename, p_surname, p_email, p_admin , v_hash, p_locked_flag);
end register_user;
md5 function is as follows
create or replace function md5hash
(p_input in varchar2)
return varchar2 is
begin
return upper(dbms_obfuscation_toolkit.md5
(input => utl_i18n.string_to_raw(p_input)));
end md5hash;
page process is dependent on the create button being pressed which is as follows
begin
register_user
(:P2_USERNAME, :P2_PASSWORD, :P_FORENAME, :P2_SURNAME, :P2_EMAIL, :P2_ADMIN, :P2_LOCKED_FLAG);
end;
Any help would be apprechiated.

Answer 1

OK it is done i put a direct copy of the app up,
workspace = mattswork
username = [email protected]
password = midemi
The app is up and is exactly the same as the one i have mentioned, the form in question is on the users tab which is page 2 i believe use a login username as matthew with no password that will give you access to the application then you can play around with the rest any help at all will be very very very much apprechiated.
Thanks Guys