Reports & Discoverer :: To Hide The Username And Password

I migrated the report from Developer 2000. This report has the drill down report with the following command.

procedure U_1ButtonAction is
begin
srw.run_report('rep022.rep paramform=no
p11="'||:cr_call_ref_no||'"');
end;

After Migration into Oracle Application Server 10g release 2 , I changed the code as following:

function U_1FormatTrigger return boolean is
begin

SRW.SET_HYPERLINK(' http://cpstest.exch1.mas.unb.com:7778/reports/rwservlet?report=E:CallSystem
ep022.rdf&USERID=dss/dss@dsdb&destype=cache& ;desformat=pdf&p11="'||:cr_call_ref_no||'"');
return (TRUE);
end;
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Problem

When I run the report, it shows the toolbar on the link [with the user id & password] of the drilldown report.

I wish to hide the username & password or I wish to enter my message "Click the link to open the Report".