Rewrite MOD problems on Ubuntu testing server

[deech123]

Hi guys,

In order to test further more stuff and not to kill my live server :-)
I installed Ubuntu server.

in the folder www I have the folder prestashop.
when I activate friendly url and create the .htaccess file
I get this :

# .htaccess automaticaly generated by PrestaShop e-commerce open-source solution
# http://www.prestashop.com - http://www.prestashop.com/forums

# URL rewriting module activation
RewriteEngine on

# URL rewriting rules
RewriteRule ^([a-z0-9]+)\-([a-z0-9]+)(\-[_a-zA-Z0-9-]*)/([_a-zA-Z0-9-]*)\.jpg$ /prestashop/img/p/$1-$2$3.jpg [L,E]
RewriteRule ^([0-9]+)\-([0-9]+)/([_a-zA-Z0-9-]*)\.jpg$ /prestashop/img/p/$1-$2.jpg [L,E]
RewriteRule ^([0-9]+)(\-[_a-zA-Z0-9-]*)/([_a-zA-Z0-9-]*)\.jpg$ /prestashop/img/c/$1$2.jpg [L,E]
RewriteRule ^lang-([a-z]{2})/([a-zA-Z0-9-]*)/([0-9]+)\-([a-zA-Z0-9-]*)\.html(.*)$ /prestashop/product.php?id_product=$3&isolang;=$1$5 [L,E]
RewriteRule ^lang-([a-z]{2})/([0-9]+)\-([a-zA-Z0-9-]*)\.html(.*)$ /prestashop/product.php?id_product=$2&isolang;=$1$4 [L,E]
RewriteRule ^lang-([a-z]{2})/([0-9]+)\-([a-zA-Z0-9-]*)(.*)$ /prestashop/category.php?id_category=$2&isolang;=$1 [QSA,L,E]
RewriteRule ^([a-zA-Z0-9-]*)/([0-9]+)\-([a-zA-Z0-9-]*)\.html(.*)$ /prestashop/product.php?id_product=$2$4 [L,E]
RewriteRule ^([0-9]+)\-([a-zA-Z0-9-]*)\.html(.*)$ /prestashop/product.php?id_product=$1$3 [L,E]
RewriteRule ^([0-9]+)\-([a-zA-Z0-9-]*)(.*)$ /prestashop/category.php?id_category=$1 [QSA,L,E]
RewriteRule ^content/([0-9]+)\-([a-zA-Z0-9-]*)(.*)$ /prestashop/cms.php?id_cms=$1 [QSA,L,E]
RewriteRule ^([0-9]+)__([a-zA-Z0-9-]*)(.*)$ /prestashop/supplier.php?id_supplier=$1$3 [QSA,L,E]
RewriteRule ^([0-9]+)_([a-zA-Z0-9-]*)(.*)$ /prestashop/manufacturer.php?id_manufacturer=$1$3 [QSA,L,E]
RewriteRule ^lang-([a-z]{2})/(.*)$ /prestashop/$2?isolang=$1 [QSA,L,E]

# Catch 404 errors
ErrorDocument 404 /prestashop/404.php

so this is correct because the prestashop folder name is in the path.

but when I do test my pages, I do get 404 error.
it seems that something is wrong.

I allready tried to reinstall the rewrite_mod in ubuntu like it should be...there is a missing link somewhere.
any idea?
I'm not at all a PHP or linux wizard :-)

thanks for any tip or clue.