erro parameter login not found

if dm.CDS_USUARIO.State in [dsinsert] then
begin
with dm.CDS_USUARIO do
begin
close;
Fetchparams;

Params.ParamByName(''''''''''''''''LOGIN'''''''''''''''').AsString:= DBedit2.Text;
Open;
if dm.CDS_USUARIO.RecordCount > 0 then
begin
Messagedlg(''''''''''''''''Usuario ja existe, digite outro'''''''''''''''',MtInformation,[Mbok],0);
DBedit2.SetFocus;
DBedit2.Clear;
dm.CDS_USUARIO.Close;
abort;
end;
end;
end
else
abort;

da erro ''''parameter ''''login'''' not found