no sound when playing iplayer etc

[ken chambers]

Can play sound on log on and music files
 But no sound in iplayer or other web sites
Well sometimes it works but not often

ProblemType: Bug
Architecture: i386
Date: Tue Feb 23 07:45:22 2010
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/kdeinit4
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: kdelibs-bin 4:4.3.2-0ubuntu7.2
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-19.56-generic
SourcePackage: kde4libs
Uname: Linux 2.6.31-19-generic i686