SID problem

Hi everybody, I m trying to disable/off "session.use_trans_sid". I don have access to php.ini file... hence trying to unset in the php scripts and .htaccess file . While this works in php script i.e ini_set("session.use_trans_sid","0"); but in .htaccess it seems it doesn't i.e php_flag session.use_trans_sid off ... This doesn't work.. My .htaccess file contain only above statement and nothing else ... I can not go for ini_set as it needs to be done in all the file ... so ..htaccess is the right solution for me ..... but it doesn't work in .htaccess ... What may be the possible reason/causes?? Please help me .. PHP 4.2.2 Thanks in advance Binay