I've found the problem for me and Cratonic AND for all people with the problem !!! it's a web browser function called << SPDY >> google it ^^
We need to mannualy deactivate it in the browser i know how to do it with google chrome ( don't know how it work for firefox , internet explorer or other )
For Google Chrome we need to make a shortcut of the program on desktop , then Rick clic on it and select Properties , and add this in target : << --use-spdy=off >> ( without the <<>> ) see my screenshot for this
THEN ONLY LANCH GOOGLE CHROME WITH THIS SORTCUT BECAUSE IF NOT ... THE SPDY FUNTION IS ACTIVE !!!