Forms :: How To Pull Off Report From Builder 6i Within Specific Date(s)

SQL Plus version Oracle8 Enterprise Edition Release 8.0.5.0.0 - Production
PL/SQL Release 8.0.5.1.0 Production
Forms Version : 6i
Reports Version: 6i
O/S : Microsoft Windows Xp professional Version 2002 Service Pack 3

With regards to the above version description here is my query. I have a form which calls report it accepts various parameters like date between, appeal and so on . I want the report to be restricted to the date parameter as passed by the user.Here is my coding which runs report

Declare
Pl_id ParamList;
where_cond varchar2(2500);
Begin
------------Appeal------------------
if
upper(ltrim(rtrim(:appeal)))<> 'ALL' then
where_cond:= where_cond ||'and tbl_donation.appeal_code='||ltrim(rtrim(:blk_ihelp.appeal_code));
else
where_cond:= where_cond||' and tbl_donation.appeal_code is not null';
end if;

-------------Date Option----------------
if
:date_option is not null then
if
:date_option = 'BETWEEN'then
where_cond:=' and tbl_donation.donation_date between '''||ltrim(rtrim(:fdate))||''' and ''' ||ltrim(rtrim(:tdate))||'''';
else
where_cond:=' and tbl_donation.donation_date '||:date_option||''''||ltrim(rtrim(:fdate))||'''';
end if;
end if;

--------------Country-------------------
if
upper (ltrim(rtrim(:country))) <> 'ALL'then
where_cond:= where_cond||'and tbl_donation.country_code='||ltrim(rtrim(:blk_ihelp.country_code));
else
where_cond:= where_cond||'and tbl_donation.country_code is not null';
end if;

-------------Contact Code---------------
if
:contact_code is not null then
if
:contact_code = 'BETWEEN'then

[Code]....