i am getting this error when i click any link on the page after the installation.

Not Found

The requested URL /member/signup was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Any help? or i am doing something wrong

Problem is solved found in this thread by Stan
http://developers.jcow.net/forums/viewthread/73

yeah, it's also in our FAQ: http://www.jcow.net/docs/?s=faq