Problem with htacess / Permalinks

Hello.

I tried a dozen times to change the permalink of my post but it just won’t work. When i change the structure to ‘post-name’ there will pop-up that i have to make my htaccces writable. Sounds easy, right – but nothing changes when i do this. The htacces it’s writable but still i can’t change my permalink. This is what my htacces tells me:

{\rtf1\ansi\ansicpg1252\cocoartf1344\cocoasubrtf720
{\fonttbl\f0\fmodern\fcharset0 Courier;\f1\fnil\fcharset0 Monaco;}
{\colortbl;\red255\green255\blue255;\red48\green45\blue41;\red239\green244\blue246;}
\paperw11900\paperh16840\margl1440\margr1440\vieww10800\viewh8400\viewkind0
\deftab720
\pard\pardeftab720

\f0\fs24 \cf0 \expnd0\expndtw0\kerning0
RedirectMatch 301 ^/([^/]+)/$ http://www.oliverney.com/$1
\f1 \cf2 \kerning1\expnd0\expndtw0 \
<IfModule mod_rewrite.c>\
RewriteEngine On\
RewriteBase /
\f0 \cf0 \cb3 \expnd0\expndtw0\kerning0
wordpress/
\f1 \cf2 \cb1 \kerning1\expnd0\expndtw0 \
RewriteRule ^index\\.php$ – [L]\
RewriteCond %\{REQUEST_FILENAME\} !-f\
RewriteCond %\{REQUEST_FILENAME\} !-d\
RewriteRule . /
\f0 \cf0 \cb3 \expnd0\expndtw0\kerning0
wordpress/
\f1 \cf2 \cb1 \kerning1\expnd0\expndtw0 index.php [L]\
</IfModule>\
# END WordPress\
}

How can i solve that?

Thanks!