SEF is not working - once more - Joomla! Forum - community, help and support

hi!

i know there have been lot of threads topic. couldn't figure out change in htaccess.

1. enable sef in in global configuration , renamed the htaccess file.
2. registered domain @ united-domains.de , got them webspace @ lycos.
3. thing phpinfo says rewrite ist this:
directivelocal valuemaster value
url_rewriter.tagsa=href,area=href,frame=src,form=,fieldset=a=href,area=href,frame=src,form=,fieldset=

4. in end error when loading site after renaming htaccess:

code: select all

internal server error
the server encountered internal error or misconfiguration , unable complete request.

please contact server administrator, cfwebadmin , inform them of time error occurred, , might have done may have caused error.

more information error may available in server error log.

has idea how sef work?
thanks lot hint.

in htaccess file  un comment line this

rewritebase /


########## begin - joomla! core sef section
############# use section if using joomla! core sef
## (rewritecond) lines in section required if actually
## have directories named 'content' or 'component' on server
## if not have directories these names, comment them out.
#
rewritecond %{request_filename} !-f
rewritecond %{request_filename} !-d
#rewritecond %{request_uri} ^(/component/option,com) [nc,or] ##optional - see notes##
rewritecond %{request_uri} (/|\.htm|\.php|\.html|/[^.]*)$  [nc]
rewriterule ^(content/|component/) index.php
#
########## end - joomla! core sef section