I have installed your extension "WordPress Backup" without any problem. But just after activating it, I receive a blank page. Blog home page is blank (empty) at all.
I have to delete manually via ftp the plugin folder to make my blog working again.
Now I have the plugin installed but not activated. When I try to go to options page making clic on the link in the list plugin page, I receive a message "You have not the rights to access this page".
How can I solve? Thanks.