I use a 32 bit server with 4 gb ram and AC runs fine (with server 2003) - the slowest I see is about 15-20 seconds if the file has lots of imported items - I think you might have a bottleneck somewhere - what are your workstations?
Vickie - out of curiousity go the server and bring up AC - open a chart and go to imported items see how long it takes, add a prescription and time it. Then go do the same on the same pt. chart on one of your workstations and compare. There is maintenance you can do on the server and the workstations - in AC clear deleted items out of mailbox. On Windows use disk cleanup to clear out unnecessary files, etc.
I think 6.0.9 may also be the version that was just inherently slow and even with your current setup you could upgrade to the newest version online. I really ran into this problem with 6.0.9 as I recall and AC stepped up and tried to rapidly correct once they realized the gravity of the situation.
P.S. I use Server 2003, but run it as peer to peer without the hassle of using a domain and all the other bells and whistles that I do not know enough about to fully use.
