PREPARE statement for DROP PROCEDURE

[JJ26]

Hi there,
is there someone could help me out ? urgent!!!!
is it really a bug or ???
Mysql is in version 5.0.21

i create a procedure which is dynamically dropping existing procedure .
the syntax :

create procedure checkSP (nmSP varchar(200) )
begin
declare ada int;
set ada = 0;
select count(*) into ada from information_schema.ROUTINES where ROUTINE_NAME = nmSP;

if ada>0 then
  SET @S := concat('Drop procedure `', nmSP , '`;' );
  PREPARE stmt FROM @S;
  EXECUTE stmt;
  DEALLOCATE PREPARE stmt;
  select @S as state;
else
  select 'Error';
end if;

end;

when i set the input parameter to 1 of the existing procedures : CALL checkSP('abc')

it punches an error message
"this command is not supported in the prepared statement protocol yet" errorNo. 1295

but i got read a news of what have been updated in ver 5.0.13 is that the error 1295 already fixed. forget the URL link. and i haven't ask this prob in Mysql official forum.

many thanks from me *JJ*