I am having trouble creating a drill through report. I have gone about it two different ways. First I used the toggle visiblity action to make sub-reports visible within the master report. This works perfectly in the preview but when run in the project fails and says to check the inner exception. The second method was using the navigate to report document action. This also worked in preview but not in the master report and returned the same error message. The error message is within the silverlight report viewer but I cannot find any data from the exception. I simplified my report down to two text boxes that use the toggle visiblity action to hide one text box and it still does not work. Basiclly anytime I use the action event it fails. Has anyone had this problem or am I missing something in my configuration?