How to set default credentials on Vista using .Net ?

[Rizwan Bashir]

Hi I have build an application which needs to write log files in user specified folder during settings with in the application + it need to connect with Access and update the records. When my application runs on XP it works fine but when It runs on Vista it do not get the default credentials and used to have readonly rights on the machine.So write log fails and while updating access it does not allow me. I can check the default rights using system.security.principle class but how can set the default credentials for application as the user who run's the application do have rights to read/write/delete on machine. Any idea's Best Regards Rizwan Bashir