Thank you for bringing this to our attention. We've made some refactoring for the Q3 SP1 release which made evident the dependency of the Report and ReportServiceUri properties. I've logged the problem in our bug tracking database and we would fix the issue for subsequent version of the product, for the time being, please set the ReportServiceUri first and then the Report property.
As for the error you've got when trying to open a support ticket - on 28th we had temporary issues with our web site, but now everything should work just fine.
Your Telerik points have been updated as a token of gratitude for pointing this problem out.
All the best,
the Telerik team