HTTP Response Splitting

Hi! 
 
I have a problem trying to test a vulnerability in a 
PHP application. The app. is vulnerable to an HTTP 
Response Splitting attack under Windows 2000 + 
IIS Web Server with IE 6 Browser but this doesn't 
work with Apache 2.0.40 + GNU/Linux and 
Konqueror. 
 
The HTTP Response Splitting attacks only works 
with IIS Web Servers? Or this doesn't work ONLY 
with Apache web servers? 
 
Thanks 

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