NewCannot install any Newsmag demo

Hi there,
I installed the Newsmag theme and put in the purchase code. On the “Install demos” page I cannot install any of the shown demos. The following message is shown. Please help! Thomas

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Ajax error. Cannot connect to server, it may be due to a misconfiguration on the server.
textStatus: parsererror
td_ajax_request_name: full_demo_media_3
errorThrown: SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

responseText: is_wp_error $file_array: http://demo_content.tagdiv.com/Newsmag/blog/7.jpgWP_Error Object
(
[errors] => Array
(
[http_404] => Array
(
[0] => Service Temporarily Unavailable
)

)

[error_data] => Array
(
)

)
0