jain-sip

[josehr]

Hello, I'm a student and I have to do a project using jain-sip. I have downloaded jain-sip-presence-proxy and jain-sip-applet-phone and the first thing I want to achieve is to send a REGISTER from the phone to the proxy but I fail. This message appears:

Could not create a register transaction!
Check that the Registrar address is correct! javax.sip.TransactionUnavailableException: Cannot resolve next hop -- transaction unavailable

Is there any manual or tutorial about this code?

Thank you very much.