How do I force a close connection in SOAP

I'm using SOAP::Transport::HTTP::Daemon for a perl soap server. IT
works well except that some clients don't release connections and block
other connections from connecting. Is there a way to force the http
session to close (even if keep-alive was specified in the header) after
the request is complete? Or is there a way to close the connection
after a certain amount of time?

Please Help!

Thanks,
Elie.