First make sure that both computers have ShadowProtect installed.
Make sure that both computers have a user account with a password.
Make sure that simple file sharing is disabled on both machines. Here is how:
http://www.storagecraft.com/kb/questions.php?questionid=185
If it still does not work, you may need to change the DCOM settings Here is how:
http://www.storagecraft.com/kb/questions.php?questionid=62
Once this is done, open the Network View panel in ShadowProtect and add a new Node
One server name, put the name of the computer, or a name you want
On server address, put the computer IP Address.
Group you can leave blank.
In server description, you can put anything you want.
Under Auth Settings:
On domain name, put your workgroup name. Since you have two computers it is unlikely you are running a domain.
In user name, put the user name for the user account on the network computer that is passworded.
In password, put the password for that user account that you are connecting through.
You should then be able to click connect at the top of the screen and connect to the other computer on the network.