I am having issue while uploading file to a force.com site page... It throughs error 'Unauthorized' although submission goes well when file is less then 1MB.

I am having issue while uploading file to a force.com site page... It throughs error 'Unauthorized' although submission goes well when file is less then 1MB.

Hi All,

I have created a summary report named "Cases by Status" and included Case Owner and Account Name fields as columns. But still I am getting an error saying...
Challenge not yet complete... here's what's wrong:  The 'Cases by Status' report does not include the Owner and Account Name columns. Where am I going wrong?