Hi Stephen,
I think the medium trust settings for this machine need changing to allow linq to sql to work properly.
The same problem happened before, link to the thread below.
http://support.jodohost.com/showthread.php?t=12653&page=2
I am sure you will know exactly what it is as you sorted it last time.
Can you please change win31 so that it is the same as the other machines.
Thanks,
Paul.