graphite output not actually writing into graphite, even though it creates namespace

Disclaimer : logstash beginner, graphite newbie.

SunOS patch-dr 5.10 Generic_147440-19 sun4u sparc SUNW,Sun-Fire-V440
logstash-1.1.13-flatjar.jar
graphite: 0.9.10

Sending output to graphite seems to be working :

Sending carbon messages {:messages=>["apache.eservices.reqtime 0.004142 1369903283"], :host=>"localhost", :port=>2003, :level=>:debug, :file=>"/opt/logstash/logstash-1.1.13-flatjar.jar!/logstash/logging.rb", :line=>"35", :method=>"debug"}

However, checking in graphite, around that specific time, will result in a empty image (the 'image not found'-icon). Selecting the whole day will only show a timeline after the timestamp.

Dumping the whisper db gives an empty table.

The apache.eservice.reqtime space from the example is being created, so something happened at least... Is there a way I can debug this further?

I find no errors anywhere...

cheers,
Wim