If the subject actions causes a System Event Log error:

    Event ID : 20101
    Source : Router
    Type : Warning
    Description: Using the default value for Registry parameter Enabled
        because the value given is not in the legal range for the parameter.

This error does not prevent RRAS from functioning properly. It is caused by an incorrect value in the registry. Edit:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Router\Interfaces\(x)

where (x) varies based on the number of NICs installed. Look for the Enabled value name of each key, a type REG_DWORD value. The valid enties are:

0 - False
1 - True (default)

When you find the Enabled value name that is not set to 0 or 1, set it to 1.