Extremly long loading time to specific domain

[lclair_plusline]

Hi,

I have installed a private instance with a Windows 7 agent. I use IE11 via wpt_driver.
If any further system information is needed, feel free to request it.

I have problems running tests to a specific domain (http://www.bauhaus.info).
When I run tests to other domains (e.g. http://www.webpagetest.org) the loading time is normal, but if i run tests to http://www.bauhaus.info the loading time is up to 40s which is defenetly not correct.

   

When I run the test with same parameters on a public instance I don't get a normal loading time: http://www.webpagetest.org/result/140910_8R_BBQ/

Any ideas why this is happening?