System.Security.Permissions.SecurityPermission

[Roman]

I am getting the following exception while opening a
workbook; theWorkbook = excelObj.Workbooks.Open(fileName,
0, true, 5, string.Empty, string.Empty, true,
Excel.XlPlatform.xlWindows, "", false, false, 0, true,
false, false);



Exception Type: System.Security.SecurityException
PermissionType:
System.Security.Permissions.SecurityPermission
PermissionState: <IPermission
class="System.Security.Permissions.SecurityPermission,
mscorlib, Version=1.0.5000.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089"
version="1"
Flags="UnmanagedCode"/>

GrantedSet: NULL
RefusedSet: NULL
Message: Request for the permission of type
System.Security.Permissions.SecurityPermission, mscorlib,
Version=1.0.5000.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089 failed.
TargetSite: Void CheckHelper
(System.Security.PermissionSet,
System.Security.PermissionSet,
System.Security.CodeAccessPermission,
System.Security.PermissionToken)
HelpLink: NULL
Source: mscorlib