Hi, this is Alec Whittington from CrystalTech Web Hosting. I wanted to clarify a few things as I stumbled upon this post. First off, when it comes to CAS, I am the guy at CT that determines what settings to use and to test them out. I am not sure who you contacted for a copy of the config, but the request was never given to me. We have provided several customers with a copy of this so they can work with 3rd party vendors, Ryan from InstantAsp.co.uk can verify this.

As far as our CAS level goes, we use a modified version of Medium Trust, ours is actually less restrictive than a true Medium Trust. No, I repeat NO, hosting company could run the Medium Trust config out of the box. By default this config dis-allows Web Services, Sockets, and Remoting. These are all commonly used in shared web hosting. A quick test to see if your host is running a true Medium Trust environment is to write a quick web service and then try to use it on the host. If it does not fail, they are using a Modified Medium Trust.

If you are having issues, please feel free to contact me directly awhittington @NOSPAM@ crystaltech.com. I will provide what assistance that I can.