stealth htaccess problem

[stuffresearch]

Hello,
I tried to use your stealth htaccess.
I saved this file https://github.com/wireghoul/htshells/blob/master/mod_php.stealth-shell.htaccess as .htaccess and too as favicon as described at :
http://www.justanotherhacker.com/2011/12/writing-a-stealth-web-shell.html
I saved client from here: https://github.com/wireghoul/htshells/blob/master/stsh.pl

$ perl stsh.pl http://172.16.202.134/favicon.ico
Connecting to shell at http://172.16.202.134/favicon.ico - type 'exit' to exit
shell> id
Error! No payload in response!

shell> exit
Error! No payload in response!
$ perl stsh.pl http://172.16.202.134/.htaccess
Connecting to shell at http://172.16.202.134/.htaccess - type 'exit' to exit

I already have AllowOveride All into my apache directive.
Please, can you show me a correct direction to use this ?
Regards,

[stuffresearch]

simply typing:

a2enmod rewrite, solve my problem, the solution was look at error.log

thank you :) work a charm !