skip to a next track in asx

Hello.

Can any one of you please tell me how i can skip to a next track after playing the presenf track for a specified peroid of time.
For example:

<ASX VERSION="3.0">
<ENTRY>
<REF HREF="http://song1.wma" />
</ENTRY>
<ENTRY>
<REF HREF="http://56.79.154.34:80" />
</ENTRY>
<ENTRY>
<REF HREF="http://song2.wma" />
</ENTRY>
</ASX>

In the above asx file i want the second file (http://56.79.154.34:80) which is an online radio which i have created using shoutcast to play only for 5 Minutes. Then the Third File (http://song2.wma) should play.

Please some one help me.

Thanks and regards
Harsha