Hello Raja,
Displaying the grid lines should not cause any problems and the issue might be due to a JavaScript error on the page or some width settings that you have in your RadGrid. Can you please share a simplified version of your RadGrid configuration that replicates the issue, so we can test it locally?
Meanwhile, you can test without setting any width to the columns or setting the width to all columns through the HeaderStyle-Width property only.
Looking forward to your reply.
Regards,
Konstantin Dikov
Telerik by Progress