TMP directory problem

Hi, I'm using a class to write some values to a file on our server....it used to work fine but not anymore since i moved servers... This is the code I am using: if (!copy($filename, $tempfile)) { $this->error("FATAL cannot create backup file [$tempfile] [$php_errormsg]",1); exit; // Just in case } And this is the error that I am getting: ERROR FATAL cannot create backup file [/tmp/forteMaqph] [] When I had a look at the servers phpinfo and I saw that both "upload_tmp_dir" and "user_dir" have "no value" and "no value" set for them.....how do I change it (via a .htaccess file as I dont have access to the php.ini) so that I can write the data as required from my script? Thanks in advance. Cheers, -Ryan