Receiving JSON Result URL from API but no data

[obihill]

I have a Private Instance of WebPageTest running on Windows 7 64-bit. Everything seems to work fine with no issues.

However, when I test certain URLs, the JSON Result is not being returned. I get the JSON Result URL from the API Response, but when I go to the URL there is no data.

Here are two URLs I tested:

1. http://www.uvsq.fr
2. http://www.inp-toulouse.fr

However, when I test this out on Webpagetest.org API, I get the JSON Result.

This doesn't happen for all URLs, just a select few and I don't know what is happening.

Here is my API format: http://<my_ip_address>/runtest.php?url=www.uvsq.fr&f=json&video=1&mobile=1&runs=1&pngss=1&location=Local-WPTDriver:Chrome.3G

Is there something I am not doing right, or a setting I need to make to sort this out?

P.S. I also noticed that the test ids are in a different format on my private instance (150228_CK_4) than on webpagetest.org (150228_09_QDV). Any way I can change this to the latter?