The problem described in the provided information resembles the problem that many clients experience when they create dynamic dock projects with AJAX with preservation of state. The only way to be able to help you in this case however would be to ask you for a simple running
project so that we can see the code and reproduce the problem with it. Also, would it be possible for you to provide some more detailed information about the Crystal Report Viewer problem - does the error appear on a certain action, on any action, on load, or?
the Telerik team