MS600
Make sure the MS600 is connected to your LAN.
Use a LAN scanner, like fing (I use the iPad version), to confirm the MS600 can be seen.
Point a web browser at the MS600’s IP to check its configuration.
If you can’t see the MS600, is possible it is setup to use a fixed IP address that is not with your LAN subnet.
The default is to use DHCP to obtain an IP address.
I would recommend installing the Meridian Sooloos Configuration software to check / change.
Apple Time Capsule
I’m not an Apple user so not best placed to give advice, however …
Are you able to type the SMB address into Finder under Go > Connect To Server and connect successfully?
If that doesn’t work you may need to confirm that the Time Capsule is configured to use SMB.
Also, can you confirm the details of your system? Is the Time Capsule mounted in OSX?