Request for the permission of type System.Security.Permissions.SecurityPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.

Dear all,

I have created window app with SQL 2005 as backend.
The application is running properly on single PC. But iam sharing that application
& try to open from another PC which is connected in LAN.
Its showing me foll .error:

Request for the permission of type System.Security.Permissions.SecurityPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.

Plz hrlp me out....