Help with exception

I just installed NAnt on my XP-based company laptop. When I run it I get the following. Any help? I have v0.91-alpah2 (latest from Sourceforge).

Unhandled Exception: System.TypeInitializationException: The type initializer fo
r 'NAnt.Console.ConsoleStub' threw an exception. ---> System.Security.SecurityEx
ception: Request for the permission of type 'System.Security.Permissions.FileIOP
ermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c5619
34e089' 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.AppDomainSetup.VerifyDir(String dir, Boolean normalize)
   at System.AppDomain.get_BaseDirectory()
   at log4net.Config.XmlConfiguratorAttribute.Configure(Assembly sourceAssembly,
ILoggerRepository targetRepository)
   at log4net.Core.DefaultRepositorySelector.ConfigureRepository(Assembly assemb
ly, ILoggerRepository repository)
   at log4net.Core.DefaultRepositorySelector.CreateRepository(Assembly repositor
yAssembly, Type repositoryType, String repositoryName, Boolean readAssemblyAttri
butes)
   at log4net.Core.DefaultRepositorySelector.CreateRepository(Assembly repositor
yAssembly, Type repositoryType)
   at log4net.Core.DefaultRepositorySelector.GetRepository(Assembly repositoryAs
sembly)
   at log4net.Core.LoggerManager.GetLogger(Assembly repositoryAssembly, String n
ame)
   at log4net.LogManager.GetLogger(Assembly repositoryAssembly, String name)
   at log4net.LogManager.GetLogger(Type type)
   at NAnt.Console.ConsoleStub..cctor()
   --- End of inner exception stack trace ---
   at NAnt.Console.ConsoleStub.Main(String[] args)

-chris



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