Problems downloading some javascript and css files in Internet Explorer 9

Hello everyone!

First of all, I have to say that update the Internet Explorer version is not an option... My company has some problems with compatibility of old systems and we are unable to do this...

I have an application published on IIS 7.5 using .Net Framework 4.5... It's a selling platform and our sellers are having some problems to access... I checked internet connection and it is normal... What happens is some of the javascript files are not downloaded. When I check the Debug window, I can see that the IE tries to, but the request is canceled (I'm sorry if it is the correct word in english...it appears to me as "(anulado)" because I use the portuguese version of IE) and they can't use the app. Note: Sometimes it happens, sometimes not! And it even happens with image files or the page by itself!

When I try in Google Chrome, everything is fine! Always!

I don't use any compatibility mode metatag at the page, all the files are encoded in UTF-8. I referenced all the javascripts at the head of the page. There is no logs in IIS meaning anything about this.

I hope there is someone who can help me!

Thanks,

Marcelo Mourão

Software Developer