Setting up channel 24 assistance

[WitneyMusicRooms]

Hi All.

I currently have ProTools LE 7, and have been using it with an M-Box 2 for some time with great success.

I would like to upgrade to using a Channel 24 desk, which I am experienced in using but never set one up from scratch.

I need to make sure I have everything I need to get this working.

Please could someone assist with the equipment needed.

I have
-A mac and a PC that can both run the MBOX and protools no trouble.
-2 screens
-Protools LE 7
-Channel 24 desk
- 192 I/O Interface

Currently - desk connected to PC via ethernet cable
Desk connected to 192 I/O via 3 no. d-sub 25 connectors.

The software will no acknowledge and run the desk.

What am i missing as part of the unit?

Many thanks in advance for anyones help!