SipStack problem

Emil <[email protected]> Wed, 14 Mar 2007 12:14:51 +0100

Newsgroups	gmane.comp.voip.nist-sip
Message-ID	<[email protected]>

SIP is new to me and I'm trying to understand how to implement the SIP 
protocol using Java and JAIN (on Windows XP). I've tried some examples but I get the same error all the time. When trying to create a SipStack I get this message:

"javax.sip.PeerUnavailableException: The Peer SIP Stack: 
gov.nist.javax.sip.SipStackImpl could not be instantiated. Ensure the 
Path Name has been set."

Could anyone please help me? What am I doing wrong?

Thanks.
- Emil