asterisk users - Nov 2009 - *1.4 Received SIP subscribe for unknown event package: call-info

I've got a SPA942 subscribing to hints to a local asterisk 1.6; this works.
But when I try to subscribe to a remote asterisk 1.4, it doesn't work; 
the BLF is flashing yellow.

I see this in the log: "Received SIP subscribe for unknown event 
package: call-info"

The SPA942 extended function for the key is 
"fnc=blf+sd+cp;sub=13 at hostname.of.remote"

Is Asterisk 1.6 different in 1.4 regarding BLF?

Leif