将显示Amazon S3错误防火墙临时标头

I am having a issue regarding Amazon S3 urls giving the error

Provisional headers are shown

I only seem to get this error when i am connected to the wifi over certain networks my main problem is when i am in starbucks on their WIFI i get the error but on any other WIFI i dont get the error and the video will play fine.

I am using the latest Amazon PHP SDK to provide signed urls like below.

$url = $client->getObjectUrl('videos', 'movie.mp4', '+59 minutes', array(
                            'ResponseContentType' => 'video/mp4'
                        ));

This will generate me a signed url like this.

https://video.s3.amazonaws.com/movie.mp4?response-content-type=video%2Fmp4&AWSAccessKeyId=AKIAJHLH6A2TDNLM37YQ&Expires=1409164722&Signature=melsHcsVaXRONs72dhNqM407Cnc%3D

Below is the working version which has a content range bytes

    Accept-Ranges:bytes
    Content-Length:141956
    Content-Range:bytes 9223221-9365176/9365177
    Content-Type:video/mp4
    Date:Wed, 27 Aug 2014 17:39:44 GMT
    ETag:"3fde140b11d9ebb5ef8480aa859c78de"
    Last-Modified:Mon, 29 Jul 2013 10:56:00 GMT
    Server:AmazonS3
    x-amz-id-2:1+rCBJveiYu1d+fWgrvioqijD7kF3fkMNVnSi3Le8LVERwxAtRKRSSj7z7Ma01vy
    x-amz-request-id:8D1E676B0D61E8FD

But when i am on starbucks WIFI i get the error.

Provisional headers are shown

But no bytes range 0-

I know this is vague question and someone will probably instantly down vote it but it is a genuine issue i am experiencing and i really need to get it resolved.

It means anyone watching videos on my website wont be able to view them over certain WIFI connections normally public ones all i can think is it maybe a firewall error.

Any help please or suggestions