POST request does not work

POST request does not work

I want to create a POST request to a website. For this I record the POST
request with an addon for FireFox. I got this output:
https://XXXXXXXXXX/anmeldung.fcgi
POST /cgi/anmeldung.fcgi HTTP/1.1
Host: muenster.hochschulsport-nrw.de
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101
Firefox/24.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: de-de,de;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://YYYYYYYYYY/index.html
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 12
name=cilenco
HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Date: Thu, 19 Sep 2013 21:15:08 GMT
Server: lighttpd/1.4.31
Now I want to recreate the POST Request with the Simple REST Client for
Google Chrome. I set the URL to the first line and the data to
name=cilenco but it does not work. I get a wrong response. Do you have any
ideas why or do I have to use more information from above?