Windows 2008 fax with FAXCOMEXLib issues

Question

I am using FAXCOMEXLib to implement a fax service.

I create a windows service, retrieve the fax document from database, connect to fax server. everything is fine, but when I open Windows Fax and Scan. The fax job is not int the outbox queue. But if I send out with WinForm program, the job will appear in the outbox queue so that I can cancel it or remove it.

    FaxOutgoingQueue outgoingQueues;
    IFaxOutgoingJob outgoingJobs;
    outgoingQueues = fServer.Folders.OutgoingQueue;
    outgoingQueues.Refresh();
    outgoingJobs = outgoingQueues.GetJob(severJobID);
    outgoingJobs.Cancel();