I think the packet-tracer tool generates a real packet, wich will need the sa to be established.
Your ipsec tunnel is not established, if you don´t have an ipsec sa.
What output does the monitor-log bring if you try to establish the tunnel?
Try debugging for more information:
debug crypto ipsec, dont forget the term moni.
The output from both sides should help you to find the mistake in the configuration.