# FileReference.upload() and proxy problem

**URL:** <https://forum.kirupa.com/t/filereference-upload-and-proxy-problem/244735>\
**Category:** flash\
**Created:** [November 21, 2007, 9:15am UTC](https://forum.kirupa.com/t/filereference-upload-and-proxy-problem/244735 "2007-11-21T09:15:53Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Pierlala](https://avatars.discourse-cdn.com/v4/letter/p/779978/32.png) [@Pierlala](https://forum.kirupa.com/u/Pierlala)\
**Post date:** [November 21, 2007, 9:15am UTC](https://forum.kirupa.com/t/filereference-upload-and-proxy-problem/244735/1 "2007-11-21T09:15:53Z")

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Hi all,

I have a problem with the fileReference class and the proxy. The situation is a  
Flash movie in which you can select files and upload them to the server via the  
fileReference.upload() method. On the server the upload() method calls a  
Coldfusion file which handles the upload to the correct folder. Access to the  
internet goes throu a proxy. After clicking the button to fire the  
fileReference.upload() method, Flash returns a 407 error (proxy authentication  
error). This error only shows up on a Mac - Firefox combination! On a Windows -  
Firefox combination you get a prompt to fill in your proxy username and  
password. Not perfect but the upload works.

Is there a way to solve this problem? A search on the net shows a lot questions  
like this, but no answers…

Thanx allready!!

Best regards,  
Paul de Snaijer