Kevin,
I've got the latest firewire drivers loaded. I can record / playback 32 tracks. What I am not able to get working is the Venue Link that is suppose to make a session file for you. It keeps wanting to make a 18 channel file instead of a 32. And ProTools sees the console, but the console doesn't see Pro Tools..
Check couple of things, on your SC48, on Patchbay page, under Pro Tools, do you see all 32 I-O available or are 19-32 grayed out? If so, you need to re-run the firmware updater for the console. I have done this for two desks, and both times it failed first, giving an instant message that "your firmware is up to date". I have managed to come up with a "hack" to get it going, first open up Pro Tools on the same computer (this forces the new 32 IO driver to actually activate) and only then try to run the firmware updater for your desk.
If this is not the issue, then another thing to check is if you have all inputs-outputs activated in Pro Tools. Find IO Setup in menus, first click Inputs and see if you have only 18 of 32 activated. If so, simplest way to go is to select all 1-18 and hit delete, after that click default, this will create you all 32 inputs. Do the same for Outputs and you should be good to go.