24 days not good enough for you huh? ;-)
From what you say, it's difficult to tell if it's network hardware, computer hardware, server hardware or drivers.
My first guess though is that you've got mis-matched duplex settings -take a look here:
http://www.symantec.com/business/support/index?page=content&id=TECH12536
If not, as this is a new setup by the sounds of it, I'd first of all check that file copies between the client and the server in production environments are going at the speed you expect. If you get an appalling speed in production, it's not going to be much better in automation.
Some more details on what you've tried so far to diagnose, what automation options you've tried, and whether you've tried a different client etc etc. All this will help.
Here also is a link to the slow imaging troubleshooting guide which is helpful,
http://www.symantec.com/business/support/index?page=content&id=HOWTO1037
Kind Regards,
Ian./