Hello Ananthan,
Thank you for writing.
The reason for the observed error is that the our Demo application does not have read/write
access to the database file.
I have logged this issue in our Public Issue Tracking System - PITS. You can track its progress, subscribe for status changes and add your vote/comment to it on the following link -
PITS Issue.
I have also updated your Telerik points for bringing this issue to our attention.
Should you have any other questions or suggestions, do not hesitate to contact us.
Greetings,
Peter
the Telerik team