SecurityException

Question

HI ALL I need some help for my APP after running my setup and installing the .Net FrameWork I can to see the principal form but , I recibe a message like this the application attempted to perform an operation not allowed by the security policy. The operation required the SecurityException. To grand this application the required permission please contact your system administrator, or use the Microsoft.Net Security policy administration tool. System.Data.SqlClient.SqlClientPermission, System.Data thank you [email protected]