Thanks for all your help men! I have solved the problem and hopefully this info will help future LC-2 users.

The wires from the LC-2 WB controller (4-pin plug) are as follows
* Black
* Blue
* Red
* White

I have now learned of 2 separate examples where the corresponding serial cable plug wires (although the same colors) do not match up when plugs are connected. Refer the controller side of the plug when terminating wires to the RJ11 connector.

The required colors and positions for the RJ11 connector are as follows:
1. Not connected
2. White
3. Not connected
4. Red
5. Black
6. Not connected

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As long as the connected wires on the RJ11 plug match the controller side of the serial cable connector this should work.
Thanks again to all those who took time to help.

Regards,

MarkR8