NetFlow using nfacctd

Has anybody successfully set up a NetFlow collector using nfacctd? I've set up flow-accounting from my router, sent to the collector location on port 2055. Running tcpdump shows that data is getting to the collector via port 2055. However, nfacctd does absolutely nothing with the data: running in debug node, it shows no activity, and the flat file it is supposed to be outputting to stays empty.

Router config:

flow-accounting {
     interface eth2
     netflow {
         enable-egress {
         }
         server 192.168.2.12 {
             port 2055
         }
         version 9
     }
 }

Thoughts?