How to set the expiration date of an applet downloaded via a Cocoon pipeline?

[jcplerm]

I am trying to serve an applet jar via Cocoon to a Java Plugin client (JDK 1.4.2) and I am having trouble making the Plugin caching mechanism work.   The jar file is accessed via the following pipeline:    <map:match pattern="lib/*">       <map:read mime-type="binary/jar" src=""/>    </map:match>   I set the "cache_archive" and "cache_version" attributes of the "<OBJECT>" tag according to Sun's web page: http://java.sun.com/j2se/1.4.1/docs/guide/plugin/developer_guide/applet_caching.html   But the applet jar is always downloaded, even if the version in the client cache is exactly the same as on the server.   I noticed on the Java Plugin's control panel that the expiration date on the cached file is set to "12/31/69", which might be "1969", thus resulting in the jar never being cached and always downloaded from the server.   Therefore my question is: how can I explicitly set the expiration date of a jar file downloaded via a Cocoon pipeline as listed above?   Thanks,   jlerm