I have not been able to listen to BBC World Service on RealOne Player for Pocket PC Version 2.0.0.28 since a latter half of December 2008. This reason is an alternation of Real Media format, in fact, livenews_v8.ra has been changed into live_news_au_nb.ram since last December.
The first step in solving this problem is to install TCPMP on our smart phone or pocket PC. Google is a great help to install TCPMP.
After installation, go to Option>Settings>Select Page>File Associations, and check the Windows metafiles (ASX,WMX,MVX,WAX) box and other relative boxes.
When you opened live_news_au_nb.asx on TCPMP and the error message appeared, such as Unknown file format!, you might need to rewrite live_news_au_nb.asx.
<asx version = "3.0" >
<entry>
<ref href="http://www.bbc.co.uk/worldservice/meta/tx/nb/live/www17.asx" />
</entry>
</asx>
This href has a suitable time. Now I write down this article in January 2009. I hope things will go well for you.