In the Service Pack 1 (or Service Pack 2), for Windows 2003 Server is a new usergroup (DCOM User) available and a new Firewall can also be activated. For both "innovations" you must change some settings:
Please read our discription how to change the settings.
Settings of the DCOM usergroup:
http://www.publicshareware.com/download/PSF_WIN2003_SP1_DCOM_english.pdf
Settings of the firewall:
http://www.publicshareware.com/download/PSF_WIN2003_SP1_Firewall_english.pdf