In reference to your questions:
- The Upload feature throws a security exception in the online demos because of lack of write permission. This is why the page shows "Page not found". We will fix this issue however in order to show the actual message instead of "Page not found" one.
- The demos should work locally. You can quickly test the demos by running them in Cassini. Visual Studio's web server runs with FullPermission and does not require any additional setup.
In case that you want to run the demos in IIS, you need to make sure that the user, which is assigned to the application pool, has Read/Write permissions set to the folder where you need to upload files.
I hope this helps.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items