Posted by: harsh1kumar on: October 19, 2008
This post is for my reference. This may only work in older Amarok, that is Amarok 1.4.
1) Clean all proxy settings in amarok’s configuration page
2) Edit ~/.kde/share/config/kioslaverc and add the following section and settings
[Proxy Settings][$i]
ProxyType=1
httpProxy=http://username:password@proxyserver:port/
httpsProxy=http://username:password@proxyserver:port/
ftpProxy=http://username:password@proxyserver:port/
3) Save the file and restart amarok!
Source : http://ubuntuforums.org/showthread.php?t=331981