Error loading demo content

When I try and load the demo content, I get the following errors;

Warning: copy() [function.copy]: URL file-access is disabled in the server configuration in /………………../wp-content/themes/wp-opulus/nimbus/demo/load_demo.php on line 23

Warning: copy(…………./wp-content/themes/wp-opulus/nimbus//demo/images/demo_image.jpg) [function.copy]: failed to open stream: no suitable wrapper could be found in /…………….wp-content/themes/wp-opulus/nimbus/demo/load_demo.php on line 23
Unable to copy ………………./wp-content/themes/wp-opulus/nimbus//demo/images/demo_image.jpg to .