Scanning of Win 7 workstations fails

Scanning of Win 7 workstations fails

- Using SD 8.00 build 8013
- Firewall disabled on all workstations
- Dcom enabled on all workstations
- WMI enabled on all workstations
- Using serviceaccount with admin rights to all desktops.
 
still:... scanning of windows 7 workstations fails with message "either access denied or DCOM might be disabled"
What could be the issue here?

                  New to ADSelfService Plus?