Re: The requested URL /groups/ was not found on this server.
Ok Guys! I found the solution for IIS Server! There is a problem with the ‘mod_rewrite’ function, it does not work. Here is the solution and I tried it and it works. Please take a look at http://www.kylecaulfield.com/permalink-for-wordpress-iis-6-mod_rewrite-fixed-free
The result of my new Buddpress can be viewed here http://www.unitedcasting.de/
Sorry for the try above, but it’s no really good solution, so I switched into the original theme file of Buddypress theme.
Many hours today for this result and nobody knewed that. Maybe a problem of Windows worker like me 
