Error trapping on the Response.Redirect

[KoolAid]

We are using the \[code\]Response.Redirect\[/code\] to send users to a web site to take a questionnaire. We have a database that stores information about the user's eligibility to take a survey and if they are eligible, a 'Take Survey' button appears on their home page and a variable stores the URL for the Survey.On the \[code\]TakeSurvey_Click\[/code\] event, the code originally the following:\[code\]FormsAuthentication.SignOut();Response.Redirect(TheURL);\[/code\]Pretty straight forward and worked great for years. Recently, we have changed the web site to which the user was being redirected. There have been no issues for many thousands of users; however, for a reasonably significant group (2-3%), nothing happens when they press the 'Take Survey' button. I am reasonably certain after searching the internet, that I have tried all of the recommended methods for handling this situation, but none really does what I want. What I would like to happen is, that if the Take Survey doesn't send the user to the link (BTW, we have checked the link being generated for the non-working links, and they are good links), I want an informational page to appear telling them that we are having issues and if they could send us some information about their environment, it would be useful in fixing the issue. Seems simple enough, but no matter what I try, I either can't get the page to not display, or, if I use the override and send a false, it never displays and never redirects.Anyone have any ideas?