problem in recent content and content link in dashboard

hai everyone,

I problem in dashboard in drupal7.while deleting content in recent content block it showing error as shown below:
Not Found
The requested URL /apfdc/admin/dashboard was not found on this server.
Apache/2.2.22 (Ubuntu) Server at localhost Port 80.

instead of redirecting to before page it is going to server error page how to change it and it repeated same in content link also.

please give reply soonnnnnnnnnnnnnnnnn.

iam waiting for reply.

its very urgenttttttttttttttt.