On my website when I come to register a user (http://www.ecovidadesign.com/Register.aspx) it works on my local but when I upload it (shared hosting) it gives me the below error:
Security Exception
Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.
 
Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
 
You can try it for yourself.
When I asked me hosting company they said:
The error you are receiving is caused by the trust level of your hosting plan.
Trust leve ...

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