How to connect to an iMac in a LAN through Time Capsule as router

Question

SITUATION:
We have a Time Capsule at work, which we use as a router for a LAN which includes 2 iMacs, 1 PowerBook G4, and an HP Officejet Printer.
The Time Capsule connects to the internet through Ethernet, via a Static IP address. All the computers connect to the internet wirelessly through the Time Capsule, and the printer is wired to the Time Capsule.
We are trying to connect remotely to the computers in the office, keeping in mind that the Time Capsule as a router is in the middle.
SET-UP WORK DONE SO FAR:
We opened the Airport Utility, selected the Time Capsule, Advanced tab, Port Mapping option and added a device, using the local IP address of the computer we want to make available remotely.
In the Port Mapping Setup Assistant that comes up, we ran three scenarios: (1) left the Service field without a choice once and then (2) with Apple Remote Desktop and (3) Personal File Sharing.
In the first scenario, we chose 49999 as Public and Private TCP Ports (we read the figures could be in an approximate range of 42-65k), while we left the UDP Ports fields blank. In the other two scenarios we left untouched both the UDP and TCP Ports that appear as defaults when the Service field is selected.
We hit the Continue button and the Update button afterwards. The Time Capsule saved the information and restarted.
In the Sharing preference under System Preferences we chose Remote Management and clicked on the Computer Settings... button. We checked the VNC button and included a password.
REMOTE ACCESS WORK:
When we wanted to access the iMac that we just thought we had set up for remote access using a different computer connected to another network, we could not connect.
We used Chicken of the VNC to try to access the local iMac, using the Time Capsule Static IP address and the VNC password set in the Sharing/Remote Management preference in the iMac. We have been unable to access the local computer connected wirelessly to the Time Capsule so far.
We get the following message:
Could not connect to server
Connection timed out: ()
Any help out there?
Rod

Answer 1

The TC is not a streaming device.. it is merely a hard disk mounted inside a router.
That means My Receiver.. whatever that happens to be.. has to be a media device that can play from a network file store.. So there is no settings in Airport utility.. because the TC is too dumb to need to know anything.
BTW the TC is a bad place to store files, as it has no way to back itself up.