Getting Error when run NAnt.exe on Command Prompt

Unhandled Exception: System.Security.SecurityException: Request for Configuratio
nPermission failed while attempting to access configuration section 'nant'. To a
llow all callers to access the data for this section, set section attribute 'req
uirePermission' equal 'false' in the configuration file where this section is de
clared. ---> System.Security.SecurityException: Request for the permission of ty
pe 'System.Configuration.ConfigurationPermission, System.Configuration, Version=
4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' failed.
   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMa
rk& stackMark, Boolean isPermSet)
   at System.Security.CodeAccessSecurityEngine.Check(CodeAccessPermission cap, S
tackCrawlMark& stackMark)
   at System.Security.CodeAccessPermission.Demand()
   at System.Configuration.BaseConfigurationRecord.CheckPermissionAllowed(String
 configKey, Boolean requirePermission, Boolean isTrustedWithoutAptca)
   --- End of inner exception stack trace ---
   at System.Configuration.BaseConfigurationRecord.CheckPermissionAllowed(String
 configKey, Boolean requirePermission, Boolean isTrustedWithoutAptca)
   at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String co
nfigKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Bool
ean requestIsHere, Object& result, Object& resultRuntimeObject)
   at System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
   at System.Configuration.ClientConfigurationSystem.System.Configuration.Intern
al.IInternalConfigSystem.GetSection(String sectionName)
   at System.Configuration.ConfigurationManager.GetSection(String sectionName)
   at NAnt.Console.ConsoleStub.Framework.GetRuntimeFramework()
   at NAnt.Console.ConsoleStub.Main(String[] args)