Brower use ASP and not PHP

My browser shows nothing and the upload system don't work...

The test.html pages for connectors upload and browser work perfectly...

I see that in the browser, it's use asp connector and not PHP. I have change already in the fckconfig.js the lines:
var _FileBrowserLanguage = 'php' ;

var _QuickUploadLanguage = 'php' ;

What is the problem ? I don't understand :'(
I have exactly the same system configuration on a virtuel computer and I haven't the problem...

Thanks you for your help.
Sorry for my English,
Cordialy,
Clockover