I tested this by putting <trust level="Medium" /> into the web.config and it returns an error. Putting <trust level="Full" /> it obviously works but not many people like running things in Full nor does my host!

Dont know if this helps but it throws an exception of :

{"Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed."}

This Medium trust seems to have been an issue on other CuteSoft apps as well...

Euan